Your peer group are people with similar dreams, goals and worldviews. They are people who will push you in exchange for being pushed, who will raise the bar and tell you the truth. They're not in your business, but they're in your shoes. Finding a peer group and working with them, intentionally and on a regular schedule, might be the single biggest boost your career can experience.
Seth GodinBy all means, fire the customers who aren't worth the time and the trouble. But understand that the moment you insist the customer is wrong, you've just started the firing process.
Seth Godin