Okay, I admit it, I'm spoiled. Whenever I have something I really want to put music to, I use a composer. I have a great relationship with a guy who scores most of my stuff and I'm even getting to the point where I can pay him once and awhile. Sometimes, however, this is overkill.
Knoptop chimes in this week with an episode of Quick FX which reveals a great list of resources that will fill any music need you probably have (like a background track), just short of actually involving musical talent. A good example is the nifty riff he employs in his own show that quickens the pace and carries an air of fun creativity.