Contouring and highlight is a neat trick IF you do it correctly. Don't know where to start? Refer to @ModernRomance's contour/highlight makeup tutorial. Once you master that you'll want to go beyond the basics and match it up with your face shape. This little trick makes a big difference!
Don't know what's your face shape?
Pull your hair back, snap a selfie and trace out your face shape.
Refer to the face map below to contour:
Brown = Foundation one shades darker than your skin tone or bronzer
Yellow = Foundation two shades lighter than your skin tone