What's the best way to cut the caramel? Doesn't it stick to the knife??

You can also turn on a gas range burner and pass the knife through it, or turn on a propane torch and pass the knife through its flame. Be sure to point it away from your hair.

Today Show Culinary Director Bianca Henry suggested buttering the knife if it's sticking -- more great tips in the video here:
http://www.food52.com/blog/1938_how_to_make_salted_caramels