Eyeshadow Primer Potion by Urban Decay – I hear complaints of creasing eyeshadow colors all the time, especially in summer. And many women have naturally dark pigment on the eyelids, which shows through your chosen shadow colors. Take the extra 10 seconds to use this fantastic eye primer and never worry about changing or creasing eye colors again. Despite its edgy name, Urban Decay makes a whole line of products that contain rather nice and non-scary ingredients, which is important to me. It comes in Original (sheer nude), Sin (a shimmering pinky-champagne tone), Eden (a matte tawny shade) and Anti-Aging (with ingredients to help soften wrinkles after extended use). All are great, but for my own daily use and for my professional kit, the Original works just fine for everybody. Sometimes you can find it in special travel sizes, but standard size is $20 for about 1/3 of an ounce. Seems to last forever. Available at Sephora and on Urban Decay’s website.