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Rules of Thumb

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More than one thousand pieces of wisdom and advice from farmers, financiers, philosophers, teachers, salesmen, and people in all walks of life are illustrated by numerous line drawings

136 pages, Paperback

First published November 14, 1983

7 people are currently reading
397 people want to read

About the author

Tom Parker

11 books2 followers
Tom Parker is an author and illustrator who lives in Ithaca, N.Y., and works for Cornell University. He has written and illustrated Rules of Thumb volumes 1 and 2, In One Day, Never Trust a Calm Dog, and Le Livre du Bon Sens, a French translation which even he can't understand. Trained as a biologist (Earlham College) Parker spent fifteen years as the cover editor and a contributing writer for American Demographics Magazine. His writing and illustrations have appeared in text books, children's books and a long list of other publications including The Wall Street Journal, Audubon, National Wildlife, Glamour Magazine, and The Whole Earth Catalog/CoEvolutionQuarterly. Parker and his books have appeared on Late Night with David Letterman, The Tonight Show, The Today Show and on the CBS Evening News. When he is not collecting rules of thumb, Parker is a flight instructor and flies a 1956 Cessna 180 bush plane. He is currently a contributing writer for MAKE Magazine.
source: Amazon.com


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5 stars
27 (17%)
4 stars
59 (38%)
3 stars
46 (30%)
2 stars
19 (12%)
1 star
2 (1%)
Displaying 1 - 30 of 30 reviews
Profile Image for L.A. Starks.
Author 12 books733 followers
May 5, 2018
This book literally comprises 896 rules of thumb. Moreover, it is well-indexed. However, since the copy I read was published in 1983, it is primarily of historical interest. Here, for example, one will come across a submission from West Berlin--a place that more than two decades ago combined with East Berlin.

Many items are dated, although some still certainly apply. Readers will get a sense of real, capable (mainly-American) DIY culture in, for example, entries about running a dairy farm, digging a well by hand, casting metal, building steps, or making maple syrup. Authors who want to tap into this mainly pre-personal-computer (but very active) environment for their settings should take a look at Rules of Thumb.

The entries about computer programming, stock buying, and finances don't survive well, although the rule of 72 still applies, as does advice about having an emergency fund.

Readers who like "near-history" of the late 1970s and early 1980s (e.g. Ready Player One) may enjoy this book.
Profile Image for sparrowhawk dualcast.
41 reviews23 followers
March 3, 2017
A fun read which you can actually use in real life. Most of the principles are true; "To determine if a fish is fresh, check its eyes; they should be bulging, shiny and bright."
It does have some errors like this one; "To cook rice, rest the tip of your index finger on top of the rice and add enough water to reach the first joint. This works for any size pot." The amount of water needed to cook different types of rice vary and this might misled people.
Some are quite vague like; "If you really need something done, ask a busy person." I know a lot of people who won't help you, coz they're busy being lazy.
While some are great advices which we can follow: "Before you eat, ask yourself how hungry you are on a scale from 1 to 10, with 1 being an empty stomach and 10 the stuffed, bloated, after-Thanksgiving-dinner feeling. Eat only when you rate your hunger a 1 or 2. Then stop when you reach 5." A very nice tip if you want to lose weight.
I highly recommend this book for everyone.
Profile Image for Tom Schulte.
3,433 reviews77 followers
October 18, 2024
I really enjoyed perusing a page or two now and then until re-reading this quirky compendium of rules sent in by postcards and other correspondence. Images of the postcards include a hand-decorated one by Robert Crumb. This selection of rules gives a sense of the flavor and gamut:

I like this snarky attitude

806. THE COLD RULE OF TWO If your doctor treats your cold, it will go away in two weeks. If you leave it alone, it will go away in fourteen days.
Gloria Silverstein, trivia maven, Ithaca, New York


This is the type of thing that is practical and feels like wisdom distilled from experience.

807. GETTING A CONSULTING JOB Personal contacts are best for getting consulting jobs. Twenty leads should produce one assignment.
Dr. Jeffrey L. Lant, Jeffrey Lant Associates, Inc., Cambridge, Massachusetts


Also distilled from experience?

808. SMOKING HASHISH Good hashish should make you cough on the first hit.
Anonymous hashish smoker, Poplar Ridge, New York


Similar vibe and feels like passing along a life lesson.

809. PROOFREADING STATISTICS Always expect to find at least one error when you proofread your own statistics. If you don't, you are probably making the same mistake twice.
Cheryl Russell, demographer


I dubious of the ones tied to closely to monetary figures.

810. BUYING A HOUSE Don't pay more than twice your average annual income for a house.
Scott Parker, Beaumont, Texas


Anything that rhymes is great

811. IDENTIFYING A SEDGE Sedges have edges (round rushes have none).
Scott M. Kruse, Yosemite National Park, California


There is one I keep coming back to as it I see it realized in software development projects. When estimating time to deliver a project, double the time and move up to the next unit. So, "three days" means "six weeks", etc.
Profile Image for Andrew.
117 reviews9 followers
July 18, 2019
I can't prove any of the rules wrong
Profile Image for J.
32 reviews1 follower
April 20, 2018
Some rules are interesting, some are dumb, some are wrong, and most are irrelevant. An interesting and short read, though I don't think it really helped me that much, just some observations.

overall, eh.
Profile Image for Zoe McKey.
Author 72 books71 followers
December 21, 2019
Fun read. Favorite: choose the barber with the worse haircut, they cut each other's hair.
47 reviews1 follower
March 22, 2020
I like this book, though is really light reading and you have to remember not all rule of thumb is right.
Profile Image for Stephen Curran.
201 reviews5 followers
April 13, 2020
Great little book on all sorts of curios facts. Perfect toilet time book
Profile Image for Paul Denis.
7 reviews
August 22, 2020
Fun, but feels outdated most of the time. Great book for entertainment during bathroom moments.
Profile Image for Sarah Shook.
3 reviews
February 6, 2022
Some of the stuff is a little outdated, but I will still re read it in the future as most of info still applicable.
16 reviews
May 5, 2022
Good for flicking through in a waiting room but impossible to find "wisdom" in its current format of everything about everything.
This entire review has been hidden because of spoilers.
Profile Image for Deryck Hart.
12 reviews
August 31, 2022
80% outdated and useless tidbits. Not worth the read to find a trifling piece of info at the expense of exposing your mind to all the other morsels of deluded wisdom
Profile Image for Word Muncher.
294 reviews1 follower
February 25, 2024
Such a brilliant book. So many things I didn't know and so many handy and practical tips. Thank you. Everyone has to read this.
Profile Image for MisterFweem.
384 reviews18 followers
March 10, 2017
UPDATE: Just saw this review and thought, "Hell, this guy's pretty rough on the book and pretty stuck on himself besides." Then I clicked "Edit review. . . "

I probably should clarify a few things:

1. I, myself, am a hack writer.
2. I have now read this book more than once.
3. My characters may not spout trivial nonsense, but they do spout nonsense.

I think I'll shut up now.

***ORIGINAL REVIEW***

This is the kind of book you see on hack writers' shelves, well thumbed, when their work is full of characters who spout trivial nonsense and little else. It's an okay book, not one to read in one sitting as the "rules" and folk wisdom get tedious in big gulps. I've read worse.
170 reviews1 follower
June 7, 2010
This was a really fun and hopefully informative read for me. I already subscribe to this blog, so when I stumbled on the book I figured it would be good. Basically it's lots of 'rules' submitted by readers of the blog (apparently they do go through an approval process, so the odds of them being flat out wrong are largely reduced) and by an advisory panel from the site itself. Topics were very wide ranging, which I think is good bc there's info for everyone and you can kind of skip around without losing momentum. It'll be interesting to see how the advice pans out in the real world!
Profile Image for Stephy.
271 reviews52 followers
May 10, 2010
Some immediately useful examples:

Clear Ideas;
"If your data has fewer than twenty pieces of information, a graphic presentation is not needed."
- Edward R. Tufte


To Keep A Home Purrfectly Comfortable:
"If cats aren't sleeping on the radiators, turn down the heat."
- Rob Shapiro

Christmas Tree Rule Of Three:
To fins out how many old fashioned lights your Christmas tree needs, multiply the tree height time the tree width times three."
-Michael Spencer, lawyer.



Profile Image for Matthew.
547 reviews3 followers
November 16, 2014
I really enjoy books like this. In fact, when I was a child I kept my own notebook that I'd fill with trivia I found interesting, things like, "Bees have hair on their eyes."

Some of these rules of thumb are immediately practical, many are fascinating but useless (to me), and the remainder are a little funny. I picked up this book at my local thrift store and it was a great read for the price I paid (10 cents), but I'm sure visiting the Rules of Thumb blog would give a similar experience.
Profile Image for Brittany.
237 reviews
June 5, 2010
There were quite a few rules that I don't think I would ever need in my life time. Although there were quite a few rules that I highlighted as being useful. It was a fun pocket-size book to carry in my purse and a good read when I was waiting in lines or in waiting rooms.
Profile Image for Melissa.
135 reviews25 followers
September 9, 2011
I picked this up on a whim at a Borders closing and I am totally glad I did. Some of the rules are just common sense, but others are so obvious that it's really a wonder I never thought of them before. Super Funny!!
Profile Image for Dustin Tatman.
35 reviews4 followers
June 5, 2010
The problem with this book is that when you run into a rule of thumb that you know doesn't work, it kind of taints all of the others that once seemed like good advice.
21 reviews2 followers
April 22, 2010
Just a fun read. Pick it up and thumb through it (pardon the pun) and smile.
Profile Image for Paul Berg.
44 reviews
January 23, 2011
Good, quick read. It's got a useful index. I'll keep my copy as a reference.
Profile Image for Ben B.
169 reviews8 followers
February 10, 2011
A remarkably fun read. If you have a broad interest in ... well, just knowing stuff, this book is or you.
Profile Image for Cat..
1,924 reviews
August 11, 2012
Oh, fun, a sound-bite book of lists! Some interesting factoids here, some funny stuff, and some stuff I can actually use. This was a Christmas gift.
Profile Image for Mantvydas Juozapavicius.
125 reviews9 followers
September 7, 2016
Nice collection of rules for life. Mostly for residents of the USA, but non-resintents will also find useful advises.
Displaying 1 - 30 of 30 reviews

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