Yeah, stairs are sick! I remember what we used to do when I wrestled, run up and down the stairs pushups at the top crunches at the bottom. But just run up and down them till ur tired, I think what works best is whatever tires you out!;)
I usually keep going as fast as I can until I trip and smash my face into the next step jk but I just keep going till my legs just won't go anymore then I walk down but I have a huge set of stairs near my house it's great.