What you need: Looseleaf paper, pencil, eraser 

Risk level: Medium

This method is not very technical at all, but it was too good to leave out. When writing your notes, place a piece of paper beneath it and write as hard as you can so each letter is imprinted into the next page. When you start your exam, take a pencil and lightly shade over the text. You should be able to see the notes. When finished, erase the page. 

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