Dave Barry is by far one of the funniest people alive. I have a few of his books, the first of which I bought at a bus station, as preparation for a long trip. In addition to books, Dave also maintains a weblog, which has daily links to funny stuff on the Internet (Dave Barry and his readers, who supply some of the links, can find something funny in just about anything).
Dave used to write a weekly column for The Miami Herald. Unfortunately, he took a vacation from writing the weekly column, but in the link you can find Dave Barry classics, which are still hilarious.