If you have a helpful partner who breaks your stuff, buy extended warranties and say "That's so sweet of you, but if you work on (insert item) it will void the warranty."
I paid the extra $500 for an extended warranty on a new car once after a well meaning sweetheart blew the engine on a 62,000 mile car. It seems if one sets the timing wrong the oil cap hits the hood of the car, oil spurts everywhere and white smoke blasts out the tail pipe.
