Impulse buying can be disastrous to a budget, but sometimes it's been known to bring my closet some long-time favorites. Buying something on the spot isn't always a bad thing if you're not over-spending, and if the items you're buying will be useful in your life.
However, certain stores lend themselves to the worst kind of purchases — the take-home-and-forget-about-it-forever kind because you never should have bought it in the first place. Headband when you're not a headband-girl, anyone? Or maybe a wooden foot massager that never made it close to your feet?