If you would to slim down your cheekbones - . 
Apply darker cheek color to hollow of cheeks.

If you are looking for a youthful look (and we are all looking for that)
Add lighter blush shade along top of cheekbone.  Apply lighter blush in circular motion to apples of cheeks while smiling.

If your Cheeks are Thin or Gaunt-looking
¨      Use a lighter cheek color along top of cheekbone and apply to apples of cheeks while smiling to create a
  plumper, younger look. Do not contour hollows of cheeks.

If Your Jawline is too wide or strong
¨      Apply darker shade blush, foundation, brunette  brow liner, or concealer along the outside bottom of
  jawline, blend in well, and lightly re-apply the True Touch® Foundation of your choice.

Nose too broad
¨      Apply darker shade blush, foundation, brunette brow liner, or concealer color along each side of the bridge of the nose, blend in well, and lightly re-apply your favorite True Touch® Foundation.

Nose too short
¨      Apply lighter shade of foundation along the length of the bridge of nose, and blend in.

Nose too long
¨      Apply darker foundation, brunette brow liner, or concealer to the tip of the nose and blend in well. Lightly re-apply your favorite True Touch® Foundation.

Here is information about True Touch Cosmetics