Without trust, nothing works very well. In simple terms, it means sticking to your principles even when it's difficult. Good leaders tend to be driven by a set of fundamental, undeniable principles. These deeply ingrained principles are shaped over a lifetime of development and introspection. As I think of it, integrity means doing the right thing.
Leadership is about people.
To be an effective leader, you must be accessible and interested in spending time with the people in your organization. I have actually worked with a plant manager who would spend most of his time in his office and when he did walk out into the plant, he kept his head down and spoke to no one. This may astonish you at first but stop and think about how much of your time is spent with the people that keep things running. Do what you say you will do and don't do what you say you won't. If the situation changes, talk it over with the people you promised.