Stay updated on the news for conversation topics

Before leaving for a party, scan through the news.

Remember that anything that happened today is good material no matter what crowd you’re circulating in.
Knowing the big-deal news of the moment is also a defensive move that rescues you from putting your foot in your mouth by asking "What everybody’s talking about?"

If you find a situation where you are left speechless, simply repeat the last few words your conversation partner says.
That puts the ball right back in his or her court, and then all you need to do is listen.