A Quote by Tim Ferriss on communication and priority

Do not over-communicate with low-profit, high-maintenance customers
There is no sure path to success, but the surest path to failure is trying to please everyone. Do an 80/20 analysis of your customer base in two ways—which 20% are producing 80%+ of my profit, and which 20% are consuming 80%+ of my time? Then put the loudest and least productive on autopilot by citing a change in company policies. Send them an e-mail with new rules as bullet points: number of permissible phone calls, e-mail response time, minimum orders, etc. Offer to point them to another provider if they can’t conform to the new policies.