LiplinerUse the side of a pencil liner instead of the point. It creates a softer definition and alleviates hard lines.
Highlight the MiddleUse a liner 1-2 shades lighter than your lipstick to fill in the center of your lips. This creates an illusion of fuller lips. It adds just the perfect amount of drama to the sophisticated sexiness of a nude lip.
Color TonesDon't try to match the color of your lips. It's better to pick a color one shade darker than your skin tone. Then use the undertones of your skin to direct you to a specific hue. Fair skin looks great with a touch of pink. Olive and dark skin look more natural with a neutral beige.
Color FinishesAlways remember that matte and sheer lipsticks often read lighter when applied to your lips. Should you choose either of those finishes go with a darker shade. Satin and vinyl finishes are what they are so pick the color closest to what you want.
Top It with GlossNever forget your gloss on top. They make your nude lip look fuller and more healthy; which of course is always all the rage.