Those purchases are, however, very different from your typical college impulse buy. I once spent $30 on Halloween candy. Quite frankly, that is just shit nobody needs. As a college student, no one is trick or treating, and there is already so much out there threatening you with the freshman 15 -- why bother? Now your tendencies may be a bit different. You may impulse buy clothes for example. While it's easier to defend an impulse purchase of clothes than candy, it's still not a very smart buy. Put simply, there's only so much clothing you will actually wear. If you actually want to save money -- don't buy new clothes too often. If you still really like shopping (which is totally understandable) limit yourself to a monthly budget. (And make sure to give away clothing that you don't wear anymore. Charity is a good thing even for the broke :) ).
So my fellow broke college students, I urge you to think about what you're buying the next time you're out shopping. Is it something you truly need to buy? If not put it back and see if you're still thinking about buying it in a few days or so. You will save yourself the frustration (and money) of making impulse buys.