There's no doubt that building a business demands everything! In fact, I always liken it to having a child. So much responsibility, so much effort, so much focus, and devotion. So little time.
From the very first indicators that your vision is coming to life, you'll find yourself swinging back and forth between moments of elation and depth of despair, a struggle between focusing on perfection and pushing for a faster speed to market, always between extremes.
One of the most critical skills I've developed over the years is the need to keep calm in moments of stress, chaos, crisis and to give yourself a break - you are human. Stay focused, breathe deep and enjoy the ride!