Don't you just hate it when you take off your nail polish to find that it's completely turned your nail base yellow or stained? Here's a quick fix. Duri Cosmetics Nail Polish in Hot Ice ($3.99) is a pale greenish-bluish nail polish that can double as a base coat, so any pre-existing tarnish that you have on your nails and toes won't distort your new color.
The concept is similar to tinted foundations, and colored concealers where the slightest tint neutralizes any discolorations. I love this idea, especially now that all these bright reds, raspberries, dark blues and blacks are back—all of which tend to leave stubborn, unwanted traces behind.