EricNoah
Adventurer
I think a lot of folks end up writing like they hear people talk or based on what they read, so reading a lot of well-written books will probably help quite a bit. Propper grammar lessons aren't as necessary to most folks unless you want to have a shared vocabulary for discussing language itself, but a good background in English grammar can help prepare you to learn a foreign language (and learning a language can help you learn more about English grammar, too!).