Matte the lips with powder foundation, take a light-colored lip liner, and draw around the natural line of the lips, bridging the Cupid's bow.
Draw a line on the lower lip very slightly below the natural lip line, but don't go into the corners. This will make the bottom lip look thicker as well.
Then, apply a nude lipstick all over the lips and up to the lip line (it should still show through).
Finish with a clear or light shimmery lip gloss applied to the middle of the lower lip only.
Keep your lips in good condition with Vaseline or lip balm. They are a great base for lipstick, giving a more stained effect.
Find out which shade of lipstick looks best on you with Lauren's color guide