Chris, I'll try to dig up any more photos I have of the storage sheds. They were done in a hurry. I'm surprised they've held up so well, in fact.
In the meantime, I put in some wood shelves into one of the steel cabinets today. They're very simple, but I made them so I could fit in a set of bins I got at Ikea. Each bin is 15"x10"x9"H, and I was able to configure the 4'x6' cabinet to hold 42 of them.
(The green is wrong in that picture -- I think that one was taken without a flash.)
This picture shows scale -- that's a quart of paint -- and also the way they fit two deep.
Here it is closed.
I've got labels I can use on the bins, and I think doing it this way will mean less dead air and better organization.
On the right side, I used one of the stock shelves up top, but then made metal-covered wood shelves that allow me to have a tall section on the right where I can store my little step ladder, a couple of brooms, and hang things like a welding jacket and a pair of overalls.
A lot of the storage is temporary, right now. The gray bins are from Harbor Freight and will organize fasteners.