What do you do when you can't sleep?

I like to put myself through strenuous mental exercises. They're pretty challenging. My most common one is picturing a white field. When my 'vision' is nothing but white and I'm sure I've locked it in, I placed a perfect black square right in the middle of this white field and hold that flawless image as long as I can. It's very difficult and exhausting. The mind is awesome.

Jam it back in, in the dark.

Originally Posted by RainMan

I concentrate until both the black field and the square disappear. When they do, it usually means I am in a state of deep meditation.

Ooh that is very cool, I shall have to try this variant.

There's nowhere I can't reach.