Buy what you want the first time! (If you can afford it). Example: You want Jeans A, but they're a little pricey so you think you're being frugal by buying Jeans B, which are cheaper and not so great. However, Jeans B just aren't working! They look and feel terrible. But now you've worn them and can't take them back (or at least shouldn't...) And so what do you do? You go buy Jeans A. You've paid for two pairs of jeans and will only get use out of one! Wasted money.