I've been trying to limit myself to a general guideline of once a year, although I didn't pick anything up last year so I have the financial cushion for another purse. Honestly, as long as I'm maxing out my 401K, my Roth IRA, pay all my bills (including credit cards!), and have a healthy savings account, I don't feel guilty. Bought my first Dior this year and am already considering a second one!