These are all the ‘rules’ I am aware of. The biggest error most folk make when going into business for themselves is to believe single-mindedly in their ‘idea’. Ideas are literally ten-a-penny.  Execution is the real key and to achieve it requires talent. But Not Necessarily Your Own Talent. I have employed hundreds and hundreds of people more talented than I am in my business career. If you can persuade the talent to work for you, you are virtually home and dry — as long as you give such individuals their head (delegate!) their due (pay them and praise them!) and refrain from interfering too much (the hardest thing of all!) Making money is a knack, not rocket science. The three key qualities required are desire, stamina and perseverance.