What have I learned about promoting my novel on Kindle?

OK, so what am I learning about promotion.  I’ve learned that it’s not just about giving an e-book away for a couple of days.  Without promotion, the effort will likely fall flat.  It may only generate a few downloads and little or nothing in the way of sales.
I’ve also learned that a lot of people have made a lot of lists on where and how to promote your e-book online.  Some are paid advertisements, others are free.  Some will allow you only to promote when your e-book is free, others will allow you to post when it’s reduced, and others allow free posting of a full priced e-book.
Some web sites require varying lead times, as much as 30 days.  Others request a week, and still others are “day of” only.
I also found a list of “Twitter Influencers”.  Looks like I will have to revive my Twitter account.
Many are Facebook groups.  Virtually all memberships require approval.  After 24 hours, about 50% have been joined as members.  The rest are still “Pending.”  I’m focusing on Facebook first since it’s the social network with which I’m most familiar. 
I might add that I found a great group on Facebook.  Promotion is forbidden, but they have a great group of people.
I’ll work on Twitter next.  That should just be a matter of Following a bunch of users, and hoping that they will follow me back.
Part of my process involves worksheets.  I have consolidated the lists that I found online and I’m in the process of putting them into a table, complete with my own notes.  The goal is to separate the free from the paid, and which I can only use for my free giveaway and those that will let me do general promotion.  If I don’t, any efforts will be haphazard.
Another thing I learned is not to talk about free book giveaways in the Amazon Author forums.  It’s a subject that starts flame wars among users. 
My free giveaway has been set to start at midnight (but I think that’s Pacific time) and End Friday.  I should know how well it worked on Saturday.