I want to second this comment. I have run a business for about 18 years and still growing. I hired a business management mentor to help me, and he made me read e-myth revisited. Which was also part of his business class at the local college.
I hate doing some of the work, but I enjoy the overall, that it's well worth it for me to slog through the things I don't like. But no matter what happens, I now am a permanent business person. Maybe something just happens to you when you want to make something and be in control of it.
Mixing dreams with reality takes the ability to see what is actually possible and dismiss useless criticism and accept wise criticism.
I could be doing better, as I enjoy the technical side of things too much more than the other parts... oh well. This guys' story about the coffee house is a huge warning to many people, but to me, it's a specific warning about not doing your homework before diving into a project of any kind.
If they had, they would know the exact numbers before they started, and then they would not have started. At least they are sharing their lessons with the rest of us.