Lisa Sampson wrote:A good mandoline. Not the musical instrument but the bladed slicer. Just watch your fingers. Good ones are frighteningly sharp.
Kenneth Elwell wrote:For a "non-kitchen gadget": a digital multi-meter. Super useful for troubleshooting electric/electronic devices... and I'm a novice at it. The continuity function gets a lot of use figuring out why/where a device isn't working by checking for open/closed circuits. Voltage meter is good for testing batteries (dead or alive), and home wiring (especially for staying alive, by NOT working on energized circuits). Lots of expensive things fail to function because of loose wires, or inexpensive components breaking. Who knows how much you can save on repairs versus replacements!