Vancouver Sun editorial cartoonist Graham Harrop talks about the jobs he had before he was a cartoonist. I know it runs 8 minutes, which is now generally understood as a massive amount of time, but it's worth considering taking a look, even if you've never heard of Mr. Harrop.
His presentation made me laugh out loud. A truly funny fellow, onstage and on paper.
Mr. Harrop also draws the TEN CATS feature at Comics Sherpa.