The Music Schop is a resource for worship musicians and pastors. Song analysis of popular worship songs, theory lessons, reviews of worship resources, and tips and tricks for drummers, keyboard players, guitar players, bass players – the entire band. Written by Chris Schopmeyer.

How to Keep Up the Chops – Lost Interview with Louis Armstrong

Blink on Blank is a great YouTube channel featuring "lost" interviews. In this one, Louis Armstrong is interviewed backstage in 1964 by a couple of teenagers.

Best quote, from Louis to all musicians past and present:  

You can't take it for granted. Even if we have two, three days off, I still have to blow that horn a few hours to keep up the chops. I mean, I've been playing 50 years.... I got to warm every day. At least an hour. You know?