1: Nylon spatulas.
You can't use'em for anything. They melt as soon as they touch a hot pan,and then you have black smears of nylon on your pans and little bits of nylon in your food. Why the hell do stores sell them?
2: Starter checks.
You know, the ones the bank gives you when you open a new account. They have numbers starting in the single or occasionally double digits, and the bank gives you about ten to tide you over until your check order arrives. Virtually nobody accepts the things. Why do they still bother giving them out? Wouldn't it be better and easier to have a system set up to emboss your ATM card on the spot?
I had a third one, but I don't remember what it was.