Just stick this in your students' "Bring Back to School" side of their folder and have the kids update daily. I give a bookmark as a reward for each one turned in and after a student turns in three, he or she gets to check out an age-appropriate chapter book from my personal library.
Wonder by R.J. Palacio- Students took turns writing down the mean things people did or said about Auggie. I purposely crumpled it as I took it from one student to the next. The moral was that even if we try to smooth something out, the traces of our meanness are still there.