Spinal fusion recovery tips?

so i broke my back in june of 2008. i shattered two vertebrae and almost made them disappear and i fractured two vertebrae in my lower back. i had a spinal fusion of t-9 through t-12 and am waiting for technology to improve to get the two fractures in my lower back fused as well. but has anyone done something like this and had the fusion for longer? any tips on getting strong again? i'm locked up after a weekend of skiing and i really don't like it. aside from physical therapy anyone know of some good exercises i can do to let me ski a weekend and not pay for it for the rest of the week? anyone?