Making others Happy is a quality each and every one of us should have. It is a very simple action that can make a big difference. All you need to do to make someone happy is do whatever positive action you can to bring a smile to their face. You would even notice that the more you bring happiness to others the happier you will get. It is just the positivity you and the person are sharing. At times you may not be having a very great day, you might be upset or unhappy because of something. Sometimes we even say hurtful things, but it will do nothing but make the person and even you upset. So whenever you feel down try to bring yourself up, try to do something that makes others as well as you are happy.
The more you practice this action the happier you and the people around you would be. So make others happy and find joy while doing so.