2 very good DVDs that explain the basic principles of the mix, and especially that give real examples. Elsewhere we often extensive explanation of the principles of compression, equalization etc., but when it comes to show a practical example is always the maddening litany of "each must find its settings." The one even has music samples or one can realize the track with / without the effect in question. it talks about mixing plan for equalization, basically all a bunch of little practical things well connected to real life, and that's what I wanted. There may be better but I have not yet found :)
It's convenient, well articulated into chapters. It serves as my reminder and I return often!