Yeah. I used to be a night owl and then became a meth addict (whoops) and didn't sleep much at all for a while. When I got sober, reclaiming my sleep was the first thing I did. Proper sleep hygiene is all. Hide any clocks in your room. Go to bed at 10. Set an alarm for 6am for a few months. When you start waking up at 5:58, you can stop using the alarm. You can use the extra 2 minutes you've gained to wonder who the hell you are now.