One time when I was bored, I went to a site to read things to do when you're bored (Yes really xD)

There was some thing you could do: Stand on your chair, close your eyes and visualize that you are standing on the edge of a deep cliff. Feel the way you feel, ingage your senses and build up the moment, then jump.

It felt prety real and I was glad to fall just a little bit before hitting the ground