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!
Styles: Cut Crease with extended 'cat-tail' liner. A good primer, 'creme' type eyeshadow and gel liner works best for this look. L'Oreal HiP Color Truth Cream Eyeliner is the deal for both the 'crease' and liner.