I tend to follow the same routine when winding down for the night. I brush my teeth/ wash my face and then set my alarm. I'll usually chill in the living room with my roommates until I'm tired and then go to bed from there. I try not to be on my phone once I get in bed and to just try to go to sleep immediately rather than scrolling forever. I also don't do anything in my bed but sleep which helps my mindset in that area that I don't associate it with homework or studying.
At home I would read in bed until I was sleepy, but I don't do that much when I'm in my apartment at school because I don't want to leave the light on and keep my roommate up. I could get a small light for reading though since this class has made me consider changing up my routine.
On a night when I'm following a bad routine I may scroll on TikTok or Instagram for a while. That is always tempting, but I know it takes me longer to fall asleep when I do that, so I try to avoid it.