Red lips are hard to wear, because they so often look sloppy.
Lip liner, to create a clean and precise shape
and concealer to fix mistakes.
Here's a little walk-through:
1) Carefully line lips with a neutral or spice colored liner to create your shape
2) Using a lip brush (check my brush blog for suggestions), blend the lipliner into your lip so you don't have a harsh line
3) Use your brush to fill in with lipstick, starting from the inside of your lip out and blending into the liner.
4) Use concealer to clean up the outside, blend out into your face.
VOILA!!!! You are a scarlet lipped siren!