I remember hardly sleeping when I was in college. I had a number of consecutive semesters in which I had 20 to 23 credit hours, and I stayed in the library all night some nights. Sure, some nights were not spent at the library, but I wasn't the person who shoved something like 40 bars in a two-block radius in the ped mall.
Either I am getting older (of course this is true), or I simply didn't notice what effect sleep deprivation had on me those years ago.
Some people have religious leaders to whom they look for guidance, but I am telling you, I am not ashamed to admit that I really love Gretchen Rubin. Here is some of what she finds to be important about sleep.