Joel Arbaje 12.29.11 3:10 AM Comedy writing has two main ingredients, Conan O'Brien says. Part one: left-brain bullshitting. Part two: seeing ideas up on their feet, in rehearsal, and then reworking them. Photo by Matthias Clamer See more of the best photos of 2011 Newsletter Get the latest Fast Company stories delivered to your inbox daily. Send I'd also like to receive special Fast Company offers ARE YOU REGISTERED TO VOTE? Register now to make sure you have a voice in the election.