Also for anyone needing it, I can provide drum/guitar/bass/keyboard/some vocal tracks if needed for your mix. Just thought I might throw that out there. hehe
I could type up a long message on EQ'ing tracks but I'll try to keep it short since some of y'all have already gave advise. Pretty much how I eq my tracks to keep bass frequencies from running crazy is to try give each instrument its own frequency range, or to keep it simple, limit/High pass the instruments in question. Like for say My guitar tracks I High pass "cut off" bass frequencies below 180hz. My acoustic I usually cut below 160hz but it depends on the song. Any synths that have low end I like to usually cut at 200hz but usually use automation to vary that at some points during songs. The point is to not have a lot of instruments using the same frequency range, especially the lower frequencies cause it adds a lot of boomyness/mud real quick. High-pass filters should be used/adjusted on almost everything except-"most of the time" kick drum, bass guitars, and piano.<-depends on the song and what your going for, and what else is going on in the song as i've used a High pass on the latter before.
Oo and I just realized, that what headphones/monitors your mixing with have a big effect too. Flat response is what you want. If you don't have any good monitors/headphones, listen to your song on every source you can find,* car, home stereo, cheap boombox, surround sound, etc* I'm used to having good monitors/headphones to mix on so I don't think about it too much anymore. I'll stop now.