Valuable Links -Grammar Answers

As a finance major living in an English major's world, I have a lot of questions. Need to know when to place a hyphen? 

Whether you mean 'affect' or 'effect'? 

Whether to use 'that' or 'which'? 

Does a question mark go inside quotes or outside?

Why a gerund sentence should be avoided. 

Commas! Where do they belong?

Need I say more.

Grammar Girl is your solution for quick and dirty tips to often asked grammar questions.