I agree with Christina, distraction is key...
When I can't sit still, I play some air guitar along to blaring metal! Once the album is over, I'm tired enough to sit still for a bit... also I trick myself with the music, I let the metal gradually slow down, and without my noticing I'm unwinding...

I have to be sneaky like that or I'd sleep a week a month in total...

Hope you find something to do