Most important habit of sucessful entrepreneurs?

Apparently it's punctuality (Entrepreneur). It's difficult to argue with its importance but I don't know I've ever thought of it as the most important habit. From Entrepreneur:

being punctual gives you the right—the positioning—to expect and demand that others treat your time with the utmost respect. You cannot reasonably hope to have others treat your time with respect if you show little or no respect for theirs. So if you're not punctual, you have no leverage, no moral authority. But the punctual person gains that advantage over staff, associates, vendors, clients, everybody.