Each person has the power to influence others, even if he or she doesn’t realize it, by the way they act and the things they say. Social scientists call the phenomenon “social contagion." How can your organization use social contagion to its advantage?

Birthdays can create tricky situations for dieters. Sure, a little cake in moderation never hurt anyone, but if you or your officemates are making a concerted effort to eat healthier, lose weight and nix refined sugars and additives, that piece of cake presents quite the conundrum. Instead, why...