When I taught Grade 9 math, a lot of my students had come to high school lacking good study habits. Following the first quiz of the semester, I asked my students to submit study tips or habits that their peers could use to prepare for quizzes/tests. This is the list they generated. I turned it into a poster and shared it with them so they could refer to the list and try something new! I hope your students find it useful as well.
The list of suggestion is generic, and can span most grades.