Even if you are a seasoned supervisor, be sure to read all of this post from Wally Bock on how great supervisors do it. An excerpt:
I've found that something Leo Tolstoy said about families is also true of supervisors. Great supervisors are all alike; every bad supervisor is bad in his or her own way.
There are thousands of ways to do a bad job as a supervisor. But great supervisors do the same things in pretty much the same way. And if you learn to do them, you can get the results they get. Here's a list.
Great supervisors understand that they always have two jobs. One job is to accomplish your mission through the group. The other job is to care for your people. Great supervisors help people succeed as individuals and as a team.
Great supervisors understand the strengths and limits of their position. When you become a boss, you have less power than you did before because your performance is measured by the performance of your team. But you have far more influence.