Take something in you hand, for example, an apple, and try to remember how contract all your muscles. You can touch it, toss it up, twiddle or do whatever your want. Than take this object away. You should repeat all your actions without an object.
I suggest you start with something simply shaped like a glass, a ball, a clew or a bottle.
This exercise teach your how to control your actions and body at all. Its a daily routine for all actors with plenty of practice or not. 
The next level is well coordinated team-work. For example, try to pass the ball changing ways of passing and proportions of the ball.
So, have you got it? 

You need a partner for this exercise (or you can find somebody somwhere and mimic him. I just want to warn you: Its not in a civilized manner!) 

While your partner show you various actions you should mimic him like reflection in the mirror.The more specific, the better.

Finde an interesting poem and read it expressively. Than imagine yourself in a very unusual situation, for example, on the political debate. Try to read this poem according to the situation.