insomnia

What helped you when you had sleeping problems? I've tried drinking herbal tea, warm milk, pills, but I can't sleep well.

Busting a nut

Staying up for 24 hours playing video games than going to sleep

Try meditating and emptying your mind while you're laying down and sleeping, merely watching whatever thoughts come into your head but not engaging. Soon enough you'll reach a mental state of inactivity that coupled with fatigue will help you sleep, also working out intensely in the afternoon at the gym helps greatly. If that doesn't work you can always try an indica strain.