1. All agreed that the number one rule is, don't overpluck. Brows that are too thin can make you look older and more severe. Plus, overplucking can damage the hair follicles and lead to permanent hair loss. Instead, follow your brows' natural shape and tweeze only the stray hairs underneath. Try not to trim hairs, since too-short brows can look unnatural.
2. Alternate between brows so you don't overpluck one side, and avoid magnifying mirrors. If your brows are especially full or unruly, consider having them shaped professionally the first time, or try a stencil kit like Anastasia Brow Stix ($14 at Anastasia.net).
3. Invest in a good pair of tweezers that won't break off your brow hairs. I have my eye on Tweezerman's Garden Special Edition 2010 Mini Slant Tweezers. These cute little tweezers are decorated with bees, butterflies, and flowers, and their small size makes them easy to control ($15 at sephora.com).
4. If your brows are sparse, fill them in with a pencil in a shade that's a bit lighter than your hair color. Try Revlon's Brow Fantasy Pencil and Gel (about $7 at drugstores), which has a soft brow pencil on one side and a tinted brow gel on the other (like mascara for your brows).
Photo Credit: Jupiterimages