Robbie,
If you're just getting started (actually, even if you've been mixing a long time), you need to check out Mixerman's Zen and the Art of Mixing. It will change how you think about mixing. I can't recommend it highly enough!
I agree with others; there is much info on the web. Just be careful, because some people come off as being authoritative, when they don't really know the first thing about mixing. Be diligent and sift everything you read in forums and on websites with a fine screen.
Best of luck!