Act and communicate. It's so important that people see how to make a difference. This works and it gives me and others a lot of joy. People asking how come your'e so happy? Because life's great. But don't you see all the problems? Yes I do just like you . And there are things I can't do anything about directly, but a lot of the problems are caused by what I do indirectly. Like what? Like putting petrol in my car. So you don't do that anymore? I couldn't do without. Well sometimes on long drives I take the train, real nice talking the other day. And I don't say you need to leave your car. If you love it, keep it but at least start sharing your car with others.
Just try for ten days doing things for others, paying attention to the needs of others. Just little things, keep a door open. See the beauty of something and share it. Find things that irritate people in the office like a broken knob on a drawer and fix it when nobody's there. Watch silently the next day how it makes someone happy. Do not take credit but give your smile to someone else. What also really works is to do some cleaning. Throwing away stuff (and not buying new), space can be such a relief.