It's certainly easy to start. Every fiat currency ever created has ended up worthless!
So, along with your Confederate notes, Reichsmarks, rubles, etc., etc., etc., stuff away a few Washingtons and Lincolns, even a Ben Franklin if you're particularly masochistic, and DON'T spend them.
There is nearly a 100% probability that they, too, will become worthless. Hey, don't shoot me; I'm just the messenger!