The key to happiness is a lot of laughter in your life, but if you struggle to think of jokes to crack, buy yourself a book filled with jokes and riddles. You'll have people laughing for hours on end and you'll be the most popular person you know. There are so many good joke and riddle books to choose from so pick one up, memorise a few and you'll have people laughing in no time. Check out the popular titles What's so funny? - Kevin Sheedy, Mammoth Book Of Dirty Sick, X-rated And Politically Incorrect Jokes - Geoff Tibballs, and The Very Embarrassing Book of Dad Jokes - Ian Allen.