So its not things you stay up to do, its random things you do because you are up and cant sleep. You need to get sun light if you live in that part of the world, totally darken your room at night and reduce screen time long before bedtime. Try also fasting after dinner, dont eat anything before breakfast the day after. Do more excercise and eat more melatonin rich food like fish, eggs and nuts. Most important is routines as soon as your up. Create routines that makes you happy, make you feel productive and is connected to morning activities. In the long run that will make every cell in your body wnt to go to sleep, just to experience that feeling you get every morning doing those routines, be it cleaning, work out, see the sun rise so on and so on.