I warm up with leadpipe buzzing every day. I find it to be a great, gentle way to get the blood flowing to the lips. I do it for around 5 minutes and then not again unless things feel really poorly...then it tends to help put things together again. I also do the Thompson mouthpiece buzzing routine. There are lots of great players that never buzzed but I think it's worth trying for a few weeks to see if you like it. It seems to have made a difference in my playing and the consistancy of the level of my playing. I'm much less likely to have a bad chops day if I warm up on the leadpipe. When I skip it I usually pay for it.