Take a piece of paper (any piece of paper will do).
If you have selected an A4 piece of paper you may want to fold it in half so there is not as much of the page to add marks to.
Please see the photo below.
Take a look at the picture opposite --->
You are aiming to fold your paper twice, to give you three sections on each side, a total of 6 sections front and back.
Step 1 - fold a third of the paper into the front of the centre.
Step 2 - fold a third into the back of the centre.