Blemish Secret: "Instead of using that bulky tube of concealer to cover your blemishes, rub a bit of it on an eyeliner brush (or any slender brush) for more precise control. Don’t forget to blend the edges with your finger." 32 Makeup Tips.
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.