For visible breakouts or deep undereye circles, use a pigment-rich concealer, like Chanel Long Lasting Corrective Concealer ($40, chanel.com). Its small applicator deposits just the right amount of makeup, which is key. “The trick is not to use too much concealer,” says Osmond. “That just accentuates problem areas.” For blemishes, dab, blend, and build up coverage in thin layers. For dark circles, swipe the wand under your eyes, then pat with a finger to blend.