A VP has two jobs.
Break a tie in the senate, and go to funeral ceremonies.
Three jobs, later run for president. Eisenhower-Nixon, Kennedy-Johnson, Johnson-Humphrey, Nixon-Ford, Carter-Mondale, Reagan-Bush, Clinton-Gore. I think the only vp in the last 60 years that did not later win his party's nomination was Agnew (went to jail) and Cheney (serious health problems).