Bloody superglue. Every time I think I'm remotely skilled enouh to make a "quick repair" using the stuff, it always goes beyond horribly wrong and ends up with blobs of superglue all over the desk, one hand stuck to the thing I'm meant to be repairing, and the other stuck to some random nearby object. Dahh. Seems so simple.

I'm sure there's a dev analogy there with your least favourite language too.