Just two days left!
Have a look at the APUSH Course and Exam Description, and leaf through the theme pages. This begins on page 10 of the PDF. As you're doing so, periodically pick one of the themes and see if you can think of examples throughout the time periods that we have studied. Make sure to consider a healthy mix - don't pick examples from early periods for the early themes and late periods for the end of the list. Mix them up.