The best way to get a happy thoughts is to count every graces you received. Not to counting the money you got.
The open minded and closed mouth is the best combination to achieve the happiness.
One key to be happy is you need to erase the memory every time someone makes a mistake.
The act maybe not always bring a happiness. But there is no happiness without action.
After all, humans can be happy, can be not. Its all depend of their choice.
Credit: Tung Desem Waringin