We use primarily the ZAG/Stanley professional organizer boxes for our hardware and spare parts storage at competitions and during build.
Overstock hardware is kept in a filing cabinet to refill the organizers as needed.
The nr. 14325 (shallow, 25 removable boxes) is a fantastic hardware organizer that used to be available at Lowes or HD. Unfortunately no longer sold in US (2006), though they are still sold in europe if you search Ebay.
The 14410 (deep 10 compartments) is good for controls and pneumatic spares, ie solenoids, spikes etc.
The Plano boxes are excellent for wire terminals pneumatic fittings and other small fittings.
The ZAG's have the advantage of the removable boxes which really speed your work at times and result in fewer misfiled parts.
We have a separate labeled organizer for each hardware type:
#10 hardware, 1/4-20 hardware, wire connectors, pneumatic fittings etc.
Grab the one you need, walk over to the bench and start working on your assembly.
See here:
http://stanleytools.com/default.asp?...VIEW=ThumbView