By Krista Mashore According to a survey of businesses conducted by the consulting company Invesp (which specializes in conversion rate optimization), it costs five times more to obtain new clients as it does to retain old ones, and businesses have a 60 percent to 70 percent chance of re-selling to former clients versus a 5 percent to 20 percent chance of sales success with new ones. It’s just common sense: If you’ve given a client great service and they know they can trust you, they’re much more willing to give you their business. So, why do so many entrepreneurs pay little or no attention to client retention? Even though my closing rates are much higher than 5 percent to 20 percent, I emphasize customer retention religiously. For my coaching business, I’m constantly developing new courses and seminars, and clients who have trained with me know that I provide great value. …