Here's a simple one - Read the newspaper.
Yep, you remember that thing that is black and white and read all over. It can actually aid you in great, interesting conversation. And don't just graze the front page. If you have a few moments, pick up a paper and dive in. Check out the columns that interest you and take a look at the editorials. I am sure that you will find a topic that piques your interest...and voila, now you have something besides work (or the kids for you parents) to talk about!
What were some great conversation starters on your last date night?