Monroe style: One of Marilyn Monroes's tricks was creating a small wing on the bottom lash line. This helped the screen siren create her famous "bedroom eyes". Here's another key Monroe trick: apply white shadow in the outer corners before applying liner
Highlights are bright and contours are dark. Use bronzer or darker eyeshadows (in the crease) to create depth or contour, and use illuminators, highlighting pencils, etc. to brighten up the face for the highlight areas. It will make a huge difference!