For the top lip, I recommend slamming a stool into your lip. A little blood and a couple tears...but look at the fullness!! For the bottom lip, I recommend attempting to put a toy hat on a beagle as she tries to hide a rawhide bone under the couch. Bug her, say, 3 times and she turns, a quick snip on the lip, and WALLA! A pouty smile you can call your own!!
**bottom picutre slightly altered by saying "give me kissy lips for effects"