You write pretty well. (good is an adjective not an adverb,
You would say I write well or I am a good writer.http://englishplus.com/grammar/00000218.htm
Just trying to be helpful. I am the daughter of a school principal so she forever corrected our grammar and for some reason - you are not alone by any means, many ppl make the mistake betweeb good and well. I even hear it one the news networks!!! I am forever editing my students' (med Residents) reports - it is sort of an ingrained I think, lol And I serve on several editorial boards, one of a daily newspaper and we have reporters who make that error too, yikes!!
The other one that irks me and I see it in print too is it's and is.http://englishplus.com/grammar/00000227.htm
I know many writers really like The Elements and Style by Strunk and White but I love Mastering Effective English, an oldie but goodie. I am too young to have used it as a textbook in school but my mom did and I managed to find a copy at a library book sale for $1. Mind you, Elements is online here:http://www.bartleby.com/141/
(1918 version tho, lol)
Good luck with your writing!