Maintain it and enhance it. When Professor Powell accepted his recent teaching award he began his speech by admitting that he finds teaching hard. I asked him to describe the particular challenges of being an effective law professor. Certainly teaching is hard intellectually. But that isn't the real challenge.
Teaching is hard because teaching is emotional.
In my first-year classes, I use what we refer to as the socratic method. And I find that it's hard to do it well. It's the little things - getting the tone right. I'm trying hard to teach things which are hard to learn like precision which is what we owe our clients, and clarity and crispness. Now these are not the traits that are necessarily foremost in an American undergraduate college experience.