They quit on the one yard line.
They give up at the last minute of the game one foot from a winning touchdown.
Don't be afraid to share your frustration with a close friend - that's what the core of your network is for. Most important of all, and I learned this in a caregivers support group when we were dealing with my mother's Alzheimer's, remember you're not alone in what you're feeling!
Being an artist and business owner are opposite when it comes to the skills you need for both. Take the time to walk away from the business for a little while, if you're having a bad day - then, kick back and think about how you got here in the first place. You're not alone in feeling frustrated or having a little self-doubt. We all go through it!