Summarize this article:

Select a contour color and/or matte bronzer that is one or two shades deeper than your skin tone. For the highlighter, choose a color that is slightly lighter than your natural complexion.  Cream and powder are both acceptable choices for contouring your face. Cream provides a glossier texture on your face, while powder provides a matte look. A makeup blending brush is recommended for applying the makeup. Effective brushing ensures proper blending and avoids streaky makeup. Alter your hairstyle to better accentuate your cheeks, or to give your face an overall thinner appearance. Pulling your hair back into a ponytail, parting your hair on the side instead of the middle and adding volume to the crown of your head all help your face appear thinner.

Summary:
Purchase materials. Change your hairstyle (Optional).