Fill in your eyebrows. This step is optional depending on the fullness of your eyebrows, but is generally recommended for those who have thin or sparse eyebrows. Select a color of brow pencil or powder that is close to your natural hair color. Start by outlining the edges of your eyebrows, and then fill in the center with a bit of color. Use short strokes that mimic the look of your hair, going in the same direction of your hair growth.