In your book, Dr. Maas, you say that the bedroom should only be used for sleep and sex, and that you should keep stress out of the bedroom, and calm peacefulness in it. At college, we have one room, which serves as our bedroom, living room and study. A good college will plan for such facilities within the dorm itself. This should help. Otherwise, get earplugs and eyemasks if your roommates are disrupting your sleep schedule.
Alcohol is about the worst way to have a good night's sleep.
You should never drink alcohol within 3 hours of bedtime. I'm curious about the title of your book. I have no trouble falling asleep, but I wake up a few times each night and then have trouble getting back to sleep. This is the most common complaint of insomniacs. Try cutting out all caffeine, chocolate, alcohol and tobacco.