You know the saying about having the right tool for the right job? It's true. This weekend whilst investigating an issue under the hood of a car, I dropped a small plastic clip. It bounced off the intake manifold and rolled down between the manifold and cylinder head to come to rest between a couple of coolant pipes. Nice one. The hole it fell down wasn't big enough to get a couple of fingers in, let alone a hand. One quick trip to insert-your-favourite-car-parts-store-here and for $6 I had a retriever, also known as a pick-up tool. Or in tech-speak, a doodad for getting stuff out of tight places. It's a spring-loaded claw on the end of a flexible tube. I had someone hold a torch (flashlight if you're American) and carefully poked said tool down into the gap and was able to retrieve the plastic clip.
If I'd have gone poking around with a screwdriver, it would have ended up falling on to a timing belt or something, inevitably ending up further out of reach. The right tool did the job properly and quickly.