a frient of mine jack showed me this exercise sometimes before and i found it very useful and fun to practice anywhere.

this is an exercise that soul and rnb people do to tighten their rhythm and absolutely useful for doing shots in a band setup.  

it's basically counting 1e+a 2 e+a 3 e+a 4 e+a, and hit on the 1 on the 1, e on the 2, + on the 3 and a on the 4.  try it with a metronome.

if you find the exercise easy, here's a advanced version.

now let's start hitting our laps.

cheers!