It's been a while since I contributed on this board and my own music writing has slumped recently (to the point of nonexistence). But what the hell, here's my two cents.

I agree with Nathan and Dannthr regarding their approaches to composition. Even if you never end up writing a fugue, you'll be better off knowing how to do it.

http://www.musictheory.net/index.html

Kenny, check this site out. For starters, go through the "Lessons" pull down menu in order. This is the single most concise, well rounded, and easy to use page I've come across for learning music theory on the entire web.

If you already play an instrument, then you probably have a functional understanding of clefs, major and minor scales, and key signatures. If that's that case, click on the "Lessons" menu and dive into the section on chords and analysis. Otherwise you should start from the very beginning.

If you don't have any, I recommend going to a music store and buying some blank musical manuscript paper. Being able to write music legibly by hand and notate figured bass is a good skill to have. Even if you end up transcribing everything to computer later on, I find that it helps me focus.