I haven't found a way that I like yet. Initially used a Hi-Lift jack in the center of the front edge of the deck to lift and then set on a pair is jack stands for secuity. Then I tried a lift in the front which certainly elevated her quickly and effortlessly but in the end neither of these inspired confidence and the both blocked the center front. Now I'm using a pair of metal car ramps on the front wheels and rubber chocks at each rear. Its tall enough for me to get underneath and get a backup on the head of the spindle bolt. Once the socket and breakover bar are in place I just place a section of 4"x4" block underneath to keep it in place while I use another above to break each spindle nut loose. Once loose they unscrew easily by hand and drop the bolt, blade and spacer nicely in my hand.
I'm mowing in more of a pasture setting than a yard setting and my blades haven't held up to my satisfaction. Currently trying some of the Gators out. I tried some OEM replacements that didn't hold up near as well as the ones it came with. So far all of them leave me finishing mowing looking more like a coal miner than I like.