Tiger's Tricks:
When I need a quick digital sample, I go here:
http://www.amazon.com/So-Intense-Lis.../dp/B000002H7K
turn on Audacity, JetAudio, or some other software program capable of recording from the stereo mix, and I play the sample of the track, while the program captures it. Of course, it has to include the part I want! But that's not so hard, since they usually highlight the chorus (hook).