What are some good off ice conditioning exercises for a Goalie?

Answer 1

Juggling three balls is a good hand-eye exercise. You need stamina, so running is a given.

Practicing balance is near impossible because one day you'll be balanced, the next day you might not be. Ab exercises, like planks, and leg exercises like wall sits will help stance and being sturdy. Just be in shape, because you need to be fast, and not only once, but for the whole game, so you need to stay fit to keep up endurance.