Holding the tweezers upright, and align them with the side of your nose. Make a small mark with an eyebrow pencil to indicate the start of your eyebrow. Repeat on the other side.
Ensure that you pluck every hair between these two marks. Lay the tweezers flatly on your brow, and gently close them around the hair.
Lay the tweezers diagonally along your cheek at just the edge of your eye. Where the tweezers intersect with your eyebrow is where the next mark is placed.
Using the same delicacy as plucking the hairs between the eyes, remove any and all hair that is growing past the mark at the end.
Starting at the thickest point in your brow trace a line following its natural curves. Don't try to impose an unnatural curve.
Following your previous mark, gently pluck away hairs below it. After plucking under the brow, you can add your arch. Starting at the beginning keep the thickness between a quarter inch or half inch at the thickest. As your reach the middle, pluck more to create a taper. The end should be the thinnest part of the brow.