There's really only one thing you need to do to be a successful entrepreneur. You need to sell stuff. If you're good at selling, you spend a lot of time doing

There's really only one thing you need to do to be a successful entrepreneur. You need to sell stuff. If you're good at selling, you spend a lot of time doing it, and you do it at a profit, your business will almost always succeed. You'll be making money which you can throw at any problems that come up. This isn't to say that nothing else matters at all. For example if you have the skills and knowledge to create a great product, that's useful. But at most what it will do is amplify the results you get from the core activity of your business. Which is to sell things. All the rest is useless if you don't sell.