Diversify your shopping.
It's very easy to get caught up in a sample sale and ball out. It may feel like everything you have been looking for in a given season is finally housed all in one place, and though that may be the case, the smart thing to do is hold out. The sample sales you didn't know about always seem to be better than the one you actually went to. So instead of going ape by dropping your entire paycheck on one sale, make a list of all of the sales coming up and decide on how many sample sales you will be attending.