Students have to write in a log every time they do not turn in their homework on time and explain themselves. This helps teachers keep track of how many times the same student does not do his/her homework, makes students think about why they did not do their homework, and establishes accountability.
My adaptation of a great idea found on Pinterest-Making Memories in __ Grade. "Write down anything you want the class to remember this school year. We will read the papers throughout the last week of school. (Started the first week of school. This jar is jam-packed full and we still have a few more weeks left!)