How do you manage behaviors in Kindergarten?

I use a warm fuzzy jar and LOTS of modeling of behaviors that I WANT to see happening. Students earn warm fuzzies as a class for following classroom routines and expectations and when we fill the jar, we choose a no-cost, school appropriate reward such as extra recess, extra play time, dance parties (10 minutes), extra time to read/draw/paint/build/etc. Each time a student models the correct behavior they earn a warm fuzzy. As we move through the school year, it takes more to earn a warm fuzzy and they are given out less and less.