How do you stop dogs from barking?

Thankfully, I live in the country so whenever my dog is after birds, deer or coyotes their aren't many neighbors around to here his 5 minutes of endless barking. If you want to stop the barking, I think the best thing would to first find out what the dog is barking at. Squirrels, neighbors, cats, other dogs. I think the best thing would be to get the dog away from whatever he is barking at (you could bring him inside or chase away the squirrel or cat).