Hmm.
tons of stuff as I support a few schools self-employed. Had to buy a Toyota Avensis (the stealth taxi) to get it all in. 2 plastic bins of kit and tools + 2 bags of cables etc, toolbox and small rucksack with my lovely HP probook 4340s. Loads of cables, 6 way mains leads, external USB DVD drive, esata/USB3 SSD, PSU's, adapters of all denominations and really useful a non contact voltage detector and LED torch combined. At home I have (ebay specials) 3COM 48 port gigabit switches , NAS, old Intel server, good spec. desktop PC, UPS, fibre connectors and MAC's, AP's, in fact everything needed to get a school working again if disaster should strike.
I probably have far too much kit, but then I wouldn't be a geek otherwise would I....?