Talk to the neighbors if you get a chance

If only I had done this at a few of the places that I lived, I never would have moved in. Between finding out about the guy that sings love songs to his old girlfriend at 3am to the chain smoker in the apartment next door, you can learn a lot just by being friendly with one of the neighbors. Ask them what they think of the place, how the landlord is, etc. – get a feel for your new home before you sign anything.