Insomnia... yup that's not fun at all. That's the whole lack of sleep but not feeling tired issue. I hate it. I recommend sitting in a quiet place with the lights off and do something quiet. Like read articles online or look at funny pictures. Nothing too exciting. Or play puzzle games. I like match 3 games that are fast paced, like Jewel Quest type games. They don't require much concentration and the clicking helps keep me from fidgeting.