When waiting at the doctors, or hospitals I like to play a little game. When you walk in to the waiting room take a look at the people in there. Now pick someone and give them a name, it has to be someone you was in there before you, as they are more likely to get selected before you.
Now give that person a full name. Maybe pick a couple of people and give them name. Then sit and wait...maybe if you fancy it, give them a little story too. Eventually they'll get called up, they are (sadly) never called what you've named them, but maybe one day?
It's not much but it passes the time and is normally quite entertaining!