I don't know about you guys, but I grew up only having to share a bathroom with my brother. Yeah, I yelled at him for leaving the toilet seat up, but that was about it for conflicts we had. (By the way ladies, I trained him very well so he will make a great boyfriend/husband).
But not everyone was raised exactly the same as you were. Going to college really opened my eyes up to what it's like to live with roommates. I've had 5 roommates at this point and every one of them has been totally different. You learn a lot about yourself when you have to live with someone else, for example, in high school I could be a total slob with my room, but once I had to live in a 11'x12' cinder block room with someone else, I became a neat freak and now make my bed every morning and pick up my clothes every night and do my laundry religiously every week.
So here are my best tips for living with roommates and how you can be a better roommate: