Apply some lip gloss. Use a clear gloss on top to help reflect the light to give the illusion of a fuller lip. If you do not like the look of a gloss, then make sure the lighter lip shade you use has a sheen to it and is not matte.
- Apply it to both top and bottom lip, but apply to the middle of your lips not the right and left sides. It will spread when you smoosh your lips together but will be concentrated in the middle, making your lips look fuller.