Why do bars and restaurants have happy hours? Simple, right? To drive business on slow nights. So if everyone knows it, and everyone knows it works, why don’t other kinds of businesses take the same approach? Why don’t more companies look at times of the day, or days of the week, or months of the year when one area or another underperforms, and brainstorm ways to give people an incentive to change their buying habits — and form new ones. Don’t accept it until you’ve tried to change it.