I had this problem in college, so I changed my work schedule to address it. For example, every day I took 8 o'clock classes. Every day. I'd also try to get all

I had this problem in college, so I changed my work schedule to address it. For example, every day I took 8 o'clock classes. Every day. I'd also try to get all my other classes over by noon. I was getting back to the dorm right when my friends were waking up. I did most of my studying while they were at class. This does prevent you from having the "up-all-night" thrill of being in college, but I often found a nap between 4 PM and 6 PM was enough to get me through most evenings. And because I had already studied, I didn't feel guilt about not doing my work.