One of the first things instilled in me when I started in sales was that I had to keep in contact with my current clients. The reasoning behind this was simple in that I had already done the hard part, which was to sell myself. When a client buys from you, that means they like and trust you, thus creating more sales down the road. Unfortunately, there are many sales professionals out there who don't quite grasp the concept. Depending on your industry you can continue to sell to your previous clients. In the insurance business, I've been told that a current client may purchase a minimum of four more times over their lifetime. And all you have to do is follow up with them with a very gentle drip system. There are some great ways to do this and most are very simple. The simplest is to utilize your Google calendar for reminders to pick up the phone and touch base. Just set a reminder to call on the client's birthday (just to say "Happy Birthday") and anniversary date...