If I ever leave the house without mascara, it's either because I'm really tired or have a massive eye infection and make up cannot be placed anywhere near said pupils. Basically, I am always in mascara. Nothing wakes up your eyes like a little definition. Personally, I splurge for Make Up For Ever's Aqua Smoky Lash. It's super waterproof, rarely clumps, and looks fabulous for hours. However, when I'm experiencing a budget deficit, CoverGirl's Lash Blast Fusion does the trick almost as well as the more expensive alternatives.