I just had a thought that I should look up some handyman type organizing systems online and print out some photos to show dh and seeing if he can build himself one to organize his things. With handyman stuff there are so many little bits and pieces to keep track off - different types of nails, screws, drills, bits, etc.... And he does use them, in fact he built me three beautiful potting tables a few months ago using nothing but what we had laying around. A lot of what he keeps is handy to have - except I can never find it amongst all his stuff. But he can. Usually.
I can also check out the hardware store and see how they store their stuff!