This is a sort of "smokey-eyes light" look for begginers. You just need one eyeshadow color and a decent sponge-tip applicator (available in packs at drugstores--get the kind with the tapered, almond-shaped, tip). First, take your shadow and fill in from your lash line to your crease (but NOT above) across your entire eyelid. Then use them tip of the applicator to line just under your lower lashes. Go from the outer corner to about two-thirds across using wiggling motions along your lower lash line. Now, blend your lower lash "liner" up to meet your eyeshadow at the outer corner. If you want, you can extend this section out slightly as a cat's eye by blending it into a "V" pointing away from your eye and toward your temple.
This is a simple, monocromatic look that is very fast and easy.