Not a whole lot. In 2012, the most important thing I realized while making a deck was to state your problem, solution, and vision at the beginning.

Your deck shouldn't tell the whole story. YOU should be telling the story. And your slides should function as bullet points to tell that story.

In 2012, the only addition to our deck was a clearer sense of how we'd use the money with a use of proceeds section. I think that's unnecessary though. I think a "what we plan to do in the next 12-18 months" is more specific.