Sky hooks to hold things up (always out of stock). Long stands for stability, often with a Long weight to counterbalance. Took ages to find them at the stores. Left handed screwdrivers.
Then there's all the fun of units of measure. Order 3 bags of 100 cable ties. Get 3 cable ties.... Order 30 screws, get 30 boxes of 1000.
Recording Measurements -
Speed in atto-parsecs per micro-fortnight (about an inch per second if I remember right - a parsec is 3.26 light years and atto is the multiplier for divided by 10 to the power of 18).
Distance in Light nanoseconds (approximately the length of a 30cm/12in ruler).
Beauty in MilliHelens (the precise amount of beauty to launch 1 ship)