Make fun of yourself. Talk about your own shortcomings in a humorous way. You can be funny without hurting anyone's feelings. Self-deprecating humor is a great way to be funny without telling jokes.
Tell funny stories. Make even the most mundane story funny by injecting humor. Exaggerate minute details. Even a boring trip to the grocery store can be made funny by emphasizing the most ridiculous parts of the story.
Inject quips into your everyday speech. Quoting material like movie lines and one-liners from stand-up comedians is okay, but it's best to use lesser-known material.
Use physical humor. Pratfalls, props and exaggerated body language are all humorous when used appropriately. Visual aids leave a lasting impression on people's minds.