Freebie Desk Awards! Read Tidy Tess by Kerry Hertel. I randomly put Tess the pig in a student's desk that is exceptionally clean! They can trade it in for a reward ticket! Reward tickets are open-ended so you can write the reward that fits your classroom bunch of students!
Note: Tidy Tess is by author Kerry Hertel--Tate Publishing. (She was an aunt of one of my students so she read the book to the class--we had exceptionally clean desks that year!)