How do I choose the right domain name?

Hi friends, I want to create a website for making money from home. But I cannot make right decision. for this, I am asking question here. please answer me only the expert person. I hope this answer will help all the people like me, who are trying to make money and who are trying to create website and make money form online. I am asking this question about domain Name. my question number 1:  How do I choose the right domain name? Thanks.