Success is not a destination, it's a journey. Know that you won't know everything; be humble and be willing to put in a lot of hard work. If you're a founder of your business, your business is going to be an extension of you in a lot of cases. For us, it's really trying to measure value creation outside of your usual metrics (number of sign-ups; conversion rate; leads generated; etc.). Finally, treat every customer as if they own you, because they do.