Well I turned 25 five days ago, so school is in the past for me. :P I do not envy your life currently given I didn't really take a liking to school, but college was the highlight of my youth - if you could call it that.
Currently I'm working on various sites, making sure they work, keeping them up-to-date, creating preset Terms and Conditions for them and in the background I have spreadsheets downloaded to be saved to a hard-drive, to be sent to my apartment, to then be printed out in paper and sent to the companies who need them.
Being self-employed can be beneficial, but there is still work and a schedule to uphold, many people forget this and see self-employment as a lazy, belaboured occupation; which is a fair assumption, all things considered.
Best thing to do is drink some water or lukewarm milk, play some music or read to relax your brain, lie down in the dark (nightlight on or off - your choice) and simply drift off... Let yourself and your body get fatigued to the point of sleep.