I had something similar to this:
http://cgi.ebay.com/Commercial-Bin-Rack-Storage-Bins-Shelves-Shelving-NSF_W0QQitemZ300242870918QQcmdZViewItem?hash=item300242870918&_trksid=p3286.m14.l1318

It didn't have casters, and the bins weren't so nice, but they worked. Unfortunately, the whole shebang got lost when I divorced the ex.

I'd buy a couple like this for small parts, plus a bunch of quart and gallon freezer bags, several rolls of masking tape and some magic markers.
Use one bin for the bags, tape, markers, and a cheap digital camera, and DON'T LOSE THEM, lol.

Then, I start at the top left and work to the bottom right, using the masking tape and markers to mark each bag, bin, or piece. Try to put the masking tape on things where the residue won't be a problem (...ask how I know this).

Digital camera is used before each morning, any odd assemblies, anything with wires or multiple connected pieces, and at the end of the day.

Works for me in principle...only problems are when I don't follow my own advice, lol...and lately, with life as a disorganized mess, nothing at all seems to work...lol.

Ben