Wall runs are great for getting down and up stairs. Same with skipping a few, and rail sliding.
For wall running, usually a simple 2 step works well. It gets you over a great amount of stairs. Wall running is the best way of getting down stairs with a wall from my perspective.
Skipping stairs, going up, I just run full speed, skip about 2 or 3, and repeat. For going down, I need to be a bit more careful, and only skip about 2.
Rail sliding is also magnificent. If there is a rail by the stairs, which a lot of stairs do, just sit and slide down.
