Don't get caught up in how many hours you work. Judge success based on having goals and measuring your results. Hard work, and lots of it, is certainly needed, but focus on what you get done.
Mark CubanWhat does it take to be a successful entrepreneur? It takes willingness to learn, to be able to focus, to absorb information, and to always realize that business is a 24/7 job where someone is always out there to kick your ass.
Mark CubanYou could be beaten down by anybody and by everybody and it doesn't matter what everybody else thinks it's how you see yourself and what your own dreams are. And, you know, anybody who started a business and build a business knows there's going to be lots of times when you feel beaten down and you need some motivation and that's when I turn to that book among others.
Mark Cuban