Finished with the shed a little before 9:00, started at noon, took an hour to go to 'Nards and get shelves. I get credit for a serious workout today, and I sweated buckets. The water in the cooler was a really good idea.
There was also a lot of dust. Dust + sweat = grimy marmot.
I have now taken a shower, and I'm settling in for the evening. The shed is actually really well organized, there is room for a lot of the tools and chemicals currently in the living room to be moved out to the shed temporarily, and the whole back garage/workspace area is significantly cleaner.
It's not done by any means, but it's a hell of a lot better than it was.