I do occasionally give out stickers or candy for a job well done, or if I see a student doing something particularly nice for another. I also use a behavior chart in the shape of a traffic light. Green is good behavior, yellow is a warning, and red means we are having serious problems and a note will be sent home. For each day the student's name stays on green they earn a ticket. Tickets can be saved and turned in at a later date for a prize. The students love it and their behavior has improved since we started using the chart.