Any one that has been in this business for any amount of time, I think would agree, often it can come down to one thing that ends up working very well. And pushing on till something does work. Going past the point of wanting to quiting.
But of course, many people cant go past that point. I would be the first to admit, it can be difficult, even harder when things are not going well in the first place.
Most people find it much easier to give up and have the security of working for some one else. Which most likely wont make them rich..
ronnie