Spending money on projects you either won’t ever do, or you won’t start for at least a year, so the materials sit around collecting dust.

Fun fact: I once was going to build this kick-ass workbench/cabinet for my garage. I bought the cabinet-grade plywood and lean backing, as well as the very expensive soft-closing drawer slides. That was probably 5 years ago, I think? I still haven’t opened the UPS package of drawer slides.