Ways you can train your brain to always be happy (VIDEO)

According to American speaker, Shawn Achor, a person will be more optimistic and find happiness by sticking to five positive and simple tasks each day for 21 days.

Achor says they are:

Which means in trying these things you'll be training your brain to only think of positive things for 21 days at a stretch - which is enough time for the human brain to master an act.