I'm so into these Mark Hook Ups lately. You can join two kinds of makeup products (lip gloss, eyeliner, etc.) together by snapping them into a middle connector. Each Hook Up is only $5, and the quality is much better than you'd expect for the price.
I've been pairing a black mascara with I-Sheer Creamy Eye Shadow in Glacee, and it's such a simple way to brighten your eyes. The shadow adds a small amount of shimmer, which you can use as a base or simply as a subtle shadow on its own. Then do a quick swipe of mascara, and you're good to go.
You can tell I'm a fan, but so is Buzz. When she saw me snapping various Hook Ups in and out of connectors, she was enthralled. Then, when she found out how affordable they are, she was giddy.