I'm always surprised how many of my friends aren't hip to price adjustments...you really must take advantage of them!
Many stores (Banana Republic, Macys, Ann Taylor/Loft) offer a one time price adjustment to the current merchandise selling price when you bring your receipt back to the store within 14 days. This policy is to avoid the hassle of you returning the old merchandise and buying it back at the new price.
Savvy shoppers will actually plan out when the sale is about to happen, and buy BEFORE hand when everything is in stock.
For those of you who already take advantage of this policy, here's some exciting news: BANANA REPUBLIC has updated their cash registers so that the whole process takes less than a minute!!!! No more sighing from the clerks, or waiting ten minutes as they ineptly enter the numbers in...it's all instantly done by the computer!!!
Progress! Can't wait until all stores have it.