the correct usage of "for me" vs. "for myself"

I have been writing since the 3rd grade, doing nothing whatsoever for the publication of the same, not finishing most of it, which of course would be another reason a writer might not pursue publication. That said, I've finally gone back to school at an extremely ripe age, and find it invigorating as well as educating, but also a bit embarrassing when the fast pace of homework cuts into my time to rewrite to adnauseum, resulting too many red checks for grammar and punctuation.

Books on the subject are fun and fine to a point, but of course one cannot ask questions. Having found this website is so exciting for me, and only for a moment did that make me feel like a "highschool geek", before going into the euphoria that's become mine because I finally made a decision to live the intelligent life I always wanted to live.

My question is, regarding the phrase, I did it for "me" vs. I did it for "myself". When should I use myself vs. me?

Thank you so much. I hope you're having as much fun as I am!

L

P.S. See I'm already growing. I almost inserted an "emoticon" after my last line which of course has taken the place of "ha ha", like no one is smart enough to laugh where they're supposed to, or used when the writer is afraid they've not conveyed their mood well enough in the words they've chosen.