What effective studying hacks have you tried while studying engineering?

For every exam, make a study sheet. Some engineering professors may allow you to bring in a summary sheet while others won't. Regardless, make a study sheet that includes all of your formulas, important properties, and special notes you may need to help you remember the nuances of using the formulas during an exam. Even if you aren't allowed to use this summary sheet on your exam, taking the time to make the sheet will ensure that you study all of the necessary information required for your exam. Even if your professor schedules an open book exam, make a study sheet!