Maximum Control Possible People want to have a say about things that affect their life. You can make that happen for them by giving them as much control as possible over issues that affect them at work. Obviously that varies from person to person and situation to situation. Some people like to be left alone. Others want to see you frequently.
Some folks are qualified to make lots of decisions about their work.
Others need to develop their skills a bit before they can do the same. Some people work hard and make an effort to do the job. Others slack off. It's probably a good general rule to allow folks as much control of the basic decisions about their work as they are capable of handling and willing to handle. In today's flatter organizations, this is easier to do from an organizational standpoint, but it's hard for many of us from a personal standpoint.