Once you’re more or less settled in, take pictures of anything that might be valuable (computer, TV, stereo, jewelery, etc). What I did was keep a copy of the pictures and I gave a copy to my mom to keep. Most of the pictures were in context, and it was clear that these items were all inside the apartment. That way, if you have the misfortune to lose items due to theft or fire etc, then it makes it that much easier to show the police/insurance companies what you lost and how much it was, etc.
KNOW YOUR RIGHTS AS A TENANT!!! Contact your college housing office about renter’s rights, or your state department that is in charge of such things. If you have insects in the apartment - is that your responisbility, or your landlords? What about maintenance or distribution of keys? Can you change the locks if you want to? Can you withold rent if there is a problem with the landlord (you cannot in Ontario)? Under what conditions can you break the lease, or under which conditions can you be evicted? PLAN FOR THE WORST, and make sure you know what your rights are. I had a problem landlord two years ago (in a house shared by students) and a problem roommate last year (who left voluntarily). Things can go wrong, and it is quite easy to make things worse inadvertantly.
I also agree with going over any and all damage in the apartment you take. You might not mind the dent in the wall now, but if your landlord decides to charge you for it when you leave, you will mind! If you have a car, or have friends who may visit with cars, find out about available parking. Can they park on the street during certain hours? Are there visitor spots, etc.
Cover the ground rules with your housemate. Let them know early on what your standards are regarding garbage pile-up, dishes, cleaning the apartment, etc. Divide up your chores and settle on a reasonable schedule and level of cleanliness. ESTABLISH GUEST RULES and do not break them yourself. One problem with our problem housemate was that his girlfriend was over 24/7, and she used our phone (including long-distance calls), TV, internet, sometimes food etc without paying, while he owed us nearly 300$ in utilities. While at first we didnt mind her, it quickly became stressful because this apartment was NOT made for 4 adults to be living together, especially when one was basically free-loading.
I’m sure there’s a lot more, but those are the things I can think of right now.
Before this scares you completely, let me just add that I love living in an apartment, even with all the troubles we;ve had. It gives you a great sense of freedom and responsibility, and it can be a wonderful experience, even the first time around. As I said, plan for the worst, because bad things CAN happen, but there is also a good chance that they won’t.
Good luck finding a place, and I hope things work out well with your roommate!