What does the Vice President's daily schedule consist of?

We always hear about what Barack Obama is doing because the spotlight is always on him... But what does Joe Biden do all day?

We know the Vice President of the United States is supposed to be the President of the Senate, but that duty is transferred over to the President Pro Tempore, obviously.

But I never hear about what Joe Biden is doing all day. What does his schedule consist of? Where does he spend the majority of his time?

Is it similar to what Cheney and Gore did with their time?