The best way to learn to mix is to practice, practice, practice.
Sit and listen to songs you want to sound like. The point is to learn something new with every song you work on and don't be afraid to try new things. Make stuff off beat or out of tune every once in awhile, you never know what kind of crazy sounds you can make. Mess with automating effects. Pan, mess with mixing volumes, turn some knobs. Lookup stuff online if you have questions on how to do certain effects you've heard on a song you like.
CREATE! IMAGEN! INSPIRE OTHERS!
:)