The best thing for an incipent grease fire contained in a pot or frying pan is to just put a lid on it.

I saw one of those new aerosol can extinguishers on sale at the hardware store so I bought it. I showed it to my wife and told her I figured it would be more intuitive for her to use that the dry chem in case of a grease fire. She replied "Why do you think I keep a throw rug in front of the stove?" Smart lady.