Don't be reluctant to give of yourself generously, it's the mark of caring and compassion and personal greatness.
In every company which I have done strategic planning, the number-one value people choose is always integrity. The second values may be quality of products and services, caring about people, excellent customer service, profitability , innovation, entrepreneurship, and others. But integrity always comes first.
The three C's of leadership are Consideration,Caring,and Courtesy.Be polite to everyone.