What you need: Pentel R.S.V.P., $8; word processor, printer

Risk level: Medium 

You can use any pen you want for this cheat as long as the body is clear and there’s an easy way to get inside of it. We prefer Pentel’s R.S.V.P. because they’re comfortable to write with, they come with a screw top, and the ink is removable. 

  • Print a cheat sheet using very small font, 7 or 8 pt should work fine. 
  • Open the pen and, if you can, remove the ink. 
  • Tape the cheat sheet to the inside of the pen with the text facing outwards so you can read it.