My friend Rob is a great guest. He mixes with everyone, has a story ready to tell and keeps the glasses filled. As the politicians say, he works the room. A good guest doesn't say anything when you're given the same scented candle you gave your host last year. Besides, if their memory is that bad you can always wrap it up and give it back to them next year.
Some parties are like being dropped behind enemy lines.
As a guest you should be prepared by bringing a survival kit. Some hosts are slow to offer a life-sustaining drink. Rather than be a burden, wrap up a bottle of your favourite hooch and say it's a present for your next stop. If things get bad, say your imaginary friend will understand if you open it up. A good guest doesn't let a party get below critical mass.