Car lift. I made up my mind.
The only one I know of (that actually does something) is glucosamine. Actual improvement in clinical trials. Shouldn't hurt anything, either.
I refuse to waste energy and be uncomfortable just for the sake of exercising... but I'm willing to put up firewood, dig a hole, something useful.
Waiting on parts so I can continue working on the car that's up on my 4-post lift :D