Kate’s brows are always finished and very well-groomed, but never harsh or overdone. Filling in any empty holes and strengthening a brow can be done lightly with an eyeshadow like Glam’Eyes eyeshadow in “Dusk” ($6, at drugstores). Shadows will give you a softer finish than a pencil. Also try brushing out eyebrows with a bare mascara brush.
Another coat of Day2Night mascara ($10, at drugstores) finishes the look.