Got a screw loose?
Trying to undo a screw with a key or a coin will just raise your blood pressure. Pack a collection of screwdrivers – flat as well as Phillips; large and small – or get one of those sets with a single handle and shaft into which a tip of every kind can be fitted.
go! Drive & Camp says Black & Decker has a rechargeable screwdriver with enough tips to dismantle a cuckoo clock or a nuclear warhead.