Think back to your college days. Did you have a favorite professor who supported you? If so, chances are you’re a happier person for it, according to a recent national survey of more than 30,000 American adults, all of whom had received at least a bachelor’s degree. People who said they felt encouraged by a mentor during college were also more engaged at work, which in turn increased their odds of overall happiness. In other words, those kids from Boy Meets World owe everything they’ve got to Mr. Feeny.