Well, I'd always wondered.

This is probably something everyone else learned in elementary school (learned and remembered; for all I know I learned it too and it slipped away during the night), but I was thrilled (and you thought I had no life!) to find out that:

Periods and commas go inside quotation marks, colons and semicolons go outside. Question marks and exclamation points can go in either place (which would explain why I can never remember which is correct).

That's it. That's all I've learned today. Oh, and that this job sucks. Except I think I already knew that.