Giving just a little of your time, skills, knowledge, wisdom, will make you feel good. Giving to someone in need is good for your self-esteem, feeling useful and I believe makes us grow.
There are many benefits to using humor in the workplace. It allows you to connect better and get people's attention to pass on your message. Just hearing someone laugh is contagious and will brighten up the place. Yet it needs to be done correctly, with respect, or else humor can also be devastating.