(I'm a student, not a guru.)
Make yourself unnecessary to the running of your business.
Every event you get invited to. Every request to start a new project. If you're not saying “HELL YEAH!” about it, say “no.” We're all busy. We've all taken on too much. Saying yes to less is the way out.
Never forget that absolutely everything you do is for your customers. Make every decision—even decisions about whether to expand the business, raise money, or promote someone—according to what's best for your customers.