If someone is sad about his life, he is not seeing his life from a positive viewpoint. It is very difficult to get a negative person to think positively. However, sometimes a normally positive person gets stuck on one negative idea. If you humbly point out the good things about his life, he may realize his problem and change his way of thinking. However, he may think you are just being judgemental and get angry with you. I advise caution.

Correct:when someone is sad about his life,how can you do to cheer him up? And the answer can be:tell him some funny or embarrassing things,if this doesn't work,you may make faces to him.looool,I think this should make him feel better.^0^ Hope I've helped.

Remind him of his positive qualities. And if he has none (which would be unfortunate), be a friend and urge him to make change in his life.

oops Often I manage to have time for them.

Take him to a brothel.