Nothing helps you rationalize a purchase like the self-righteous notion of Doing Good, and that's what this shopping pass is all about. Save 30% at the Gap, Old Navy, and Banana Republic March 18-21, AND 5% of your purchase goes to Big Brothers Big Sisters. You can reuse this pass as often as you like during the valid time period.
Usually this means a whole slew of nonprofits are partnering to bring you these discounts, so if you're not a fan of BBBS, I'm sure there will be others surfacing online. I'll post them as I see them, so you may judiciously spread the wealth of your philan-shop-y.