The ability to manage customers is one defining factor that separates your average worker from someone with management potential.
While it may be your first reaction to make new sales or pursue bigger clients, the truth of the matter is that you should be paying attention to your existing customers as well.
What exactly is the best-kept secret behind incredibly successful businesses? Is it keeping up with the trends? Having an excellent workforce that will make sure your company is working in tip top shape? Or having a loyal client base who will not only keep on going back to you whenever they need your products or services?