Disclosure: Affiliate links.
Ulta has their March sale going on now where they mark down a couple of items per day. From what I understand, it's usually better to order online, because stores can sell out of the popular stuff quickly--but feel free to correct me if I'm wrong. I don't have an Ulta nearby, so I have never tried to visit one during a sale.
I'm a little bummed, because they usually have my sister's favorite Bare Minerals mascara in this sale, but not this time. I've given her that mascara twice a year for about 3 years now! Also, aren't the Butter London polishes usually marked down to $7.50, not $10? Anyway, there are still a lot of good deals, like Urban Decay Sheer Revolution lipstick, Anastasia brow pencil, and Tarte mascara. The full list is here. Anything you especially think is worth trying for half price? I'm sort of considering the Mally Face Defender, and I've heard good things about that Dermablend Setting Powder, but maybe I already have enough powder. But it's 50% off and it'll never go bad . . .