haha, yes, you might be asking in the wrong place!
But in all honesty, maybe set aside some new rules for yourself? For example, if you're one to put an expensive purse on your credit card, say, "I can't buy a new purse until I can pay for it in cash." That's what I'm doing. You could make yourself have to sell (or give away) a purse before you're allowed to buy a new one. How often are you buying purses? You could set up a rule where you're allowed X number a year, and hold yourself to it. You could buy all of them in one month if you wanted to, but you'd have a pretty boring rest of the year.
Just things like that, I guess. It depends on your shopping habits and the purses you buy. I used to buy a lot of purses, but they were just cute, cheap ones I saw. I have since upped my standards, and now I don't find myself wanting as many (er, I shouldn't say wanting, but I haven't been seriously considering buying as many).