There are some certain principles, which will help you enjoy each and every day of your life. The first and foremost way is to live in the present. You should be aware that what happened in the past cannot be changed. Thus, there are no reasons to worry about it. No one can be certain about the things that are going to happen in the future. But it is not the case with that of the present. It is the reality, in which you have to live and win.