Here are a few simple beats and exercises you can do to work on your foot control.

Play a crescendo/decrescendo with 16th notes.  
Start off VERY SLOWLY and very gradually pick up the 
speed as you get better at it.
   
   <<<<<<<<<<<<<<<< <>>>>>>>>>>>>>>>          
b |oooooooooooooooo|oooooooooooooooo|
   1e+a2e+a3e+a4e+a 1e+a2e+a3e+a4e+a

Really accent the down beat of the second measure.

Here is another beat I made up that helps work on your foot.
Once again start off VERY SLOWYLY and very gradually pick up the speed.

H |x---x---x---x---|x---x---x---x---|
s |-o--o--o-o--o--o|-o--o--o-o--o---|
b |o-oo-oo-o-oo-oo-|o-oo-oo-o-oo----|
   1e+a2e+a3e+a4e+a 1e+a2e+a3e+a4e+a