I feel a little blessed I have eyebrows as an Asian gal but I have noticed my brows needing a little filler here and there. I'm not adept to filling in with a pencil at all and leave that to the makeup artist. What I can do is use a brush which is where Benefit's Gimme Brow ($22) has been great. I love how easy it is to use and you can control it well with the precision tip. The fiber gel formula is water resistant and long wearing.
To apply, use short pressing motions, stroke brush tip along brow to define shape. Comb through to blend & build brows. For the most natural look, start at the inner edge of your brow and move outward. Repeat to add more volume.