How to be more funny than Colbert

Levitt's advise to Sudhir for dealing with Colbert;

The only advice I can give is smile a lot, but don’t try to be too funny. Oh, and one last thing: when I was on the show, before Colbert came running over to the table for the interview, they left the index cards with questions sitting at the table next to me. I was able to peer over and see what he was going to ask, and I had a few extra seconds to think of something reasonable to say — not that it helped me much.