Treat others as colleagues, not as competitors. Competition can be an incentive to self-improvement, but it takes cooperation to build a civilization. When people work together, they benefit everyone. A thousand streams, meeting, become a mighty river.
Laugh heartily- that is to say, from your heart- at least three times today.
Try to understand points of view that you don’t hold. The mind, like the body, must be stretched to keep it limber. Otherwise, it will ossify.
When dealing with others, seek solutions that will benefit both of you. You’ll find them too, then, inclined to be more generous.