Sleep problems

I'be been having some sleep problems since last year, actually, but this week I've got an average of three hours of sleep time at night. I seriously need to get a better sleep routine or it's going to kill me. I just don't know how to do it, tho. I was in the kitchen just a few ago and I thought about it. The conclusion I got it that I have many many things going in my head. I have stress, responsibilities, irresponsibilities, plans, classes, life, anxiety, etc. I won't have classes next week, thank god, and I'll try to use it as a way to fix part of myself, rest as much as I can, and eventually try to get a better sleep routine.