How to study without staying up?

Im writing rn way past midnight and I have school tomorrow and thats probably a sign but I noticed I have a weird tendancy to procrastinate on something and proceed to sit on my desk and refuse to sleep until I get it done. I always manage to get it done but I'm also aware it's not good for my sleeping habits and might affect me long term. I get so annoyed with myself since I always procrastinate on really easy stuff and I end up just staying up for no reason. I really do try to do homework early and all that. I just don't want to go back to that spiral of staying up really late just to convince myself to complete the homework. I'm so tired rn. I genuinely might need to sleep but I need to finish this hw.