This YouTube tutorial, although directed toward a horn section, can benefit all musicians; the better the interpersonal dymanics, and the more our intention is to serve the music, the better the music tends to be.
Most bass players may not be part of a bass section, but we can apply these principles to the ryhthm section, and the band as a whole.
IME, IMO, YMMV, etc.
http://www.youtube.com/watch?v=gtSUec1Kxqw