pick up a metronome, if you don't already have one, and set it on a reasonable tempo (I'd start at no faster than 100 bpm). Staying in the tempo you chose, play 16th notes, alternating feet (RLRL RLRL RLRL....). If that's too fast for you to keep them even, slow the metronome down (it's always better to do it well than to do it quickly and poorly). Once you've got the alternating pattern going well, switch up which foot is on the down beat (If you were playing where the right foot lined up with the clicks, switch so that the left foot lines up with the clicks). Once you're used to that, try paradiddles (RLRR LRLL ...). Eventually, start playing varying rhythms with your feet (it's always good to be able to play accurately, and not be restricted to playing a steady, straight patter all the time). I've always loved throwing in some triplets- not many people use them, and they sound great (when appropriate, i suppose). And finally, what I could have told you from the beginning: Work through some of the standard snare drum rudiments (rolls may be difficult to do, but knock yourself out). Just follow the link to see some of them... http://www.pas.org/resources/rudiments/rudiments.html