Why they're a waste: Another popular product your plumber really hates? Drain cleaners such as Drano and Liquid-Plumr. The ...

I bet you didn't THINK you needed a knife specifically for slicing tomatoes. But you do. You really, really do.

The Tony-winning actress and singer portrays Gaynor in Lifetime's "I Will Survive: The Gloria Gaynor Story," out Feb. 8.