(no subject)

So...you guys are smart and stuff. What questions do you think are absolutely necessary to ask when looking for an apartment? Or, what questions do you wish you asked when you were renting?
And is there a kind of tactful way to ask about smoking? I don't smoke, and the smell sort of bugs me. It's not, like, a deal breaker, but one of those 'given the choice, I would prefer not to be near it' sort of things.