to take hard time with a smile aint always easy. to show a smile to another might help. if you make the other person smile, and him/here smile back. then you have manage to do him/here happy. That feeling warm you upp from inside out, you can compeare that fealing with giving a gift to a friend.
if you are happy then people around you. are happy to make some one happy shoud make you more happy to make some one smile shoud make you smile wider
This is easy to say but hard to master. Dont think of you'r self all the time. A smile can save a life.