Is there much to do at Bangkok International Airport? « Inside Bangkok

Is there much to do at Bangkok International Airport? I will be there for about 12 hours waiting for a connecting flight. I wont go to a hotel because I know I wont sleep. Are there many shops and restaurants at the airport? ... Don't try to go around the whole airport to find something more exciting because there aren't any and it's a waste of time. And don't expect anything from the airport because it's just an airport. You should bring a book or you can get one there. ...