LiveRoll, good idea about the reciever hitches built into the floor. Before you put them in the concrete, weld a big piece of plate to them and a few short pieces of rebar, bolts or something to serve as anchors to give the recievers more ridgid anchoring into the concrete. Less chance of it working free.
I was lucky enough to be able to clean out an old bank of all of their filing cabinets and check filing cabinets, the ones that are only about 5 inches deep, heavy commercial grade steel cabinets. I have some as tool cabinets, pipe wrenches and plumbing tools in one drawer, big socket set in 1 drawer (3/4 drive), a drawer of chisels/punches...great tool chests. And I have about 100 of those drawers for parts. If they weren't labeled I'd never find anything. In the big filing cabinets I have a drawer of funnels, one for extension cords, one for electrical wire, one for plastic tarps...very good for organizing. I have a seperate 20x30 storage building with more cabinets if needed.
In my bolt bins I cut the sides out of quart oil bottles that serve as trays in each cubby hole of the bolt bin. Instead of digging in the hole for the right bolt I take out the bottle/tray and everything in that hole is out where you can see it or take it down in the main shop. Think about the bottle laying flat with the top side cut out with a razor knife. I went to the oil change place and got them out of their trash can, washed with gas, great bolt organizers.
In the old days of peanut cans with plastic tops they worked well but you couldn't see what was in them. I have my wife wash all plastic jars, (peanut butter/mayonnaise) to store screws and other small parts in. I have a filing cabinet drawer full of different sizes, always have a fresh storage jar available. I built shelves the right size for the jars, can easily see what is in them.
I keep new boxes of different size ziplock bags, (sandwich, snack, quart & gallon) to put parts in when tearing down something and don't want to lose parts if it will not be finished that day or needs to be moved or gotten out of the way until I get parts to finish.
I have several plastic totes so I can put a carbureator or starter or something small into it while I wait on parts. Less chance of losing anything.
I gutted an old big microwave years ago, took out all electrical parts and only saved the light bulb fixture and it works off of a single toggle switch. It made a great welding rod oven, if damp weather, turn the light on, heat keeps them dried out. A lot smaller than the old refrigerator some guys use.
Everything toolwise has its place, put it back so you can easily find it next time.
With all these cabinets and drawers you'd think I had a neat well organized shop. It is organized but like others, things accumulate, it still gets cluttered. So I have a sign that says, "this is my workshop, don't mess with my mess". I know where it's at, don't move it, I can't find it if you do.