Turn off Facebook. Turn off MSN. Turn of ZU. Motivate yourself; 2 pages of revision, then you can have a wank. Place biscuits or cake in a security vault that will only open when your robot overlord has marked your paper and awarded you over 96%. Anything less then 92% results in a beating. Leaving you chair before revision is complete leads to an electric shock that will paralyse you're entire body save for your right hand and your neck upwards.

This is how I passed by GCSEs with over or equal to half the paper correct or attempted.