Our brain processes significantly better if it is positive. That means we perform better when we are happy and therefore become more successful. You don't have to be successful to be happy but you have to be happy to be successful.
We perceive the world through a lens - our brain. And we can see what that lens is focusing on. Think about the new sneakers or a new car you got per example. As soon as you got it you can see it everywhere. That means we can train our brain to focus on positivity and therefore see more positive things in our life.
Based on Shawn Achor's book The Happiness Advantage I created a concept for an interactive object that makes it easier to train our mind for positivity.
Check out Shawn Achor's website if you're interested: http://www.goodthinkinc.com
Or visit my blog for further information about my bachelor project: http://www.happy-bachelor.com