Here’s a secret client care / customer service weapon: every once in a while, especially when there are no immediate fires to put out or active projects on the go, phone your clients just to check in and see how things are going. In my memory, nobody’s ever done this to me; I don’t do it myself as much as I’d like, but when I do, the reaction is almost always once of surprise and delight, and I learn a lot in the process.