Did you just buy a $500 winter coat because the forecast called for an inch of snow? Or the weather said it would be a little bit under 50 degrees this weekend? And you live in Arizona? That probably wasn't a necessary purchase. Did you drop serious dough on a midnight blue tuxedo in the case one of your buddies gets married some time next year, or you get called into a black tie event that may or may not be happening in a week--and you already HAVE a tuxedo? Again, a stupid purchase. Be more vigilant about what you buy, and you'll not only save space, you'll save a ton of money.