Work can be fun -- really. To prove it, we've come up with this guide to humor at work, with everything from the business case for fun to best workplace pranks. Check out the silliness and add some humor to your workday:

• Workplace Humor Done Right
• Why Fun at Work Matters: An Excerpt from The Levity Effect 
• Joking Around at the Office 
• Workplace Gaffe? Make ‘Em Laugh! 
• Just Kidding? Reconciling Humor with Respect

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