No two people are the same. So when it comes to having a roommate, you should be careful. You should get to know a potential roommate before accepting him or her into your apartment. You should spend time with them before you agree to certain terms. You should check his habits and his attitude. When you have chosen the right person, you should also discuss the rules in the apartment. For instance, you would have to share appliances, furniture and utensils. If you own certain appliances you would not want someone using it if he is not careful with things. There would be chores in the apartment too. Since you are sharing the place you should share the chores too. You could take turns in cleaning common areas. You could also divide the chores according to the ones you prefer. Of course, the bills should be shared as well. If you are trying to save on bills, you should both agree what measures you are going to do to save. Everything should be discussed before your roommate moves in. This will prevent any dispute in the future. It would also make life with your roommate easier and stress free in the end.