If you've ever cleaned out your closet, you may know the guilt and shame of finding some past purchase hanging there, accusingly, tags still on. Or maybe there's something that you've only worn once, or used once, and then you decided it wasn't quite right, but you've never been able to get rid of it because you paid good money for it and what would your mother say? I've been there, plenty of times, and after making lots of mistakes and spending lots of money I shouldn't, I've developed a sort of shopping mantra that has helped me, a lot, in only buying things I will actually use.