I have a 2yr old dog who is very hyper. Every time I let her out she squeaks, and runs down the stairs and on my way down the stairs she runs back up and jumps all over me till I let her out the door. She does this every time I let her out.

The key to most behavior problems is approaching things using the dog's natural instincts. Dogs see all the people and dogs in the household as a pack with each having their own rank in the pack and a top dog. Life is much easier if the 2 legged pack members outrank the 4 legged ones. You can learn to play the role of top dog by reading some books or going to a good obedience class. A good obedience class or book is about you being top dog, not about rewarding standard commands with a treat. Start at Raising Your Dog with the Monks of New Skete For more on being top dog, see Establishing and Keeping Alpha Position, Letting your dog know you are the boss

This will take some work. You may have to put a leash on her for a while to enforce not going down the steps first.

More exercise should help too.