More from my favorite swashbuckling dutch improvisor Han Bennink. I think someone gave these little "lessons" to me from notes they jotted down from a Han Bennink drum/music clinic (maybe from the Banff Jazz Workshop?):
Han Bennink's "Things to Practice":
"Play as fast as you can for 5 minutes without repeating yourself."
"Same thing goes for slow, loud, soft and any combination of them."
"Play one piece of your drumkit for 5 minutes and try to keep it interesting and do this until you have played all the pieces."
"Repeat the same beat for 5 minutes and try to keep it interesting."
"Play a crescendo lasting 5 minutes ending as loud as possible."
"Play solid time for 5 minutes, check with metronome before and after, repeat untill your time is really solid."
"Play completely free for 5 minutes, no time is allowed."
"When you think you have become good at these exercises extend them by 5 minutes each. etc".
These exercises should last you a lifetime...