Get this book! www.mixingwithyourmind.com
Very eye opening and easy to read. It has made the most positive change in my mixing and recording quality.
Focus on perfecting how you tailor your low end(bass, kick...etc).
I'd rather have a song that's too bright or not bright enough, but is tight as a rock in the low end. Muddy music sucks! I'm still trying to figure it out.
Verb is very important. Try keeping as much away from the center as possible.
Example- Pick a verb you like, send it's L/R signal hard LEFT. Make another channel of the same verb send it's signal hard RIGHT. Now you have verb on both sides and the center is clean and clear so your vox, bass... won't get lost.
Read these forum posts for lots of tricks...etc. Free knowledge!!! thumbsup