There are many things which should never start in life to live happy and peaceful life. Lie is the first things. All bad things start from telling a lie. For hiding one lie you need to lie 100 times. But it's difficult to achieve. The other big factor is enjoy whatever you have in your life and don't compare yourself with other. Don't jealous. Jealousy only gives you grief and it doesn't make you happy. If you stop comparing yourself with other you will live happy and peaceful life.