EQ

i read a great article on hometracked.com about EQ. all the articles on that site are pretty good actually. anyway - it's about how you should cut narrow and boost wide because the human ear will find it strange if you do it the other way around. there's another article about EQ for vocals so that it "sits" better in the mix. the way that i always approach it is by creating a "hole" in the frequency range for the vocals (see above) to sit in and the another instruments around it. i usually follow the EQ settings given by Bobby Owsinsky who wrote The Mixing Engineer's Handbook. in there he clearly specify the EQ for each instrument so that they can all coexist in the frequency spectrum.