What is your advice on bringing a cat into a household with a dog?

I was considering getting a cat to keep my dog company since another dog would just be to much on me. So far my dog that I have ad for 10 months now seems to be the most loving dog ever lol, and has been around many dogs and never showed any aggression. He has been around a few cats and has done nothing more then chase them when they run fast otherwise he just wants to sniff them. Any suggestions, advice, etc? I am sure at first I might have to teach the dog that he needs to be nice, how can I work this out or is it just a recipe for disaster?