Eyeshadow primer is a girl's best friend when she finds the right one. Let's talk about Urban Decay's Original Primer Potion.
The Bad: Well, this particular one is in sample form and mine is slightly (mostly) dried out, so application is annoying.
The Good: It's my favorite eyeshadow primer that I've tried. I always say this stuff makes your shadow stay on until you want it off. No joke, I always tell this fact, but I honestly have tried it out for a full 24 hours and man oh man does this stuff work. I woke up looking the same as when I went to bed. I swear by this stuff. Just buy the travel size or full size, the samples ain't worth it.