Holding the stem of a spoon against the outer corner of your eye, draw the straight line as the first step for your cat-eye. Then, flip the spoon so it's hugging your eyelid, and use the rounded outer edge to create a perfectly curved winged effect.
Winged eyeliner is a whole lot easier with this trick. To get the perfect flick in Step hold your eyeliner diagonally on your face from the corner of your nostril up to the corner of your eye. Where the pencil hits at your eye will be the perfect angle