One of the most important question in this century is how to stay happy, people blame their situation that they are not happy with their life but it is their own life they can do whatever they want and it is obvious that the thing they are doing must be making them happy directly or indirectly so how does the problem occur in one's life . The problem starts with two of the most common words of economics wants and needs, the two words may sometime use interchangeably but there is an important difference between them. A need is a requirement very important to us than only being just desirable. ...