If you are starting or already running a business and you haven't had the pleasure of reading any of Michael Gerber's E-Myth books, I would highly recommend that you grab one. E-Myth stands for the "Entrepreneurial Myth." In his books, Michael dispels many myths about being an entrepreneur and talks about working on your business vs. working in your business.
It's fairly common to see a struggling restaurant that was started by a chef or just someone with a passion for food. They own the restaurant, they run the restaurant, and they work at the restaurant. They have created a job for themselves that they can't easily walk away from. They are the restaurant. Now if you just want a job, there are better and less stressful ways of going about it, but if you want to build a company, then you need to work on it and not just in it.
What does it mean to "work on your business"? Basically, you need to spend some time outside of the kitchen and outside of the dining room and think. The goal is come up with a manual for how to run your company. Pretend that someone wants to franchise your restaurant, how would you tell them to do it?
What is the brand? How should the place look? What food should they serve? How should it be prepared? What kind of people should they hire? What kind of service should they give? What should their guests expect? What should their staff expect? How do they increase sales? How do they cut costs?
After you've taken the time to write down the answers to these kinds of questions, you'll have created a manual of what you do, how you do it, and why you do it. This manual, filled with all your systems and processes, creates tremendous value for your business. As you implement these systems, you become replaceable. The restaurant knows how to run itself. You can spend more time planning for the future and less time being the "key" employee.
It's easy to forget the "what", the "how", and the "why", when you're working 6-7 days a week, but it's time to step back and look at the big picture.
I look at it like this... It takes passion to start a business, but it takes process to build one.