They also feel less stress, are more fun to be around, are more optimistic, and enjoy their lives more than people who are unhappy.
You never know when the unexpected is going to happen, but when it does happen, you're surrounded by chaos. Being prepared for the worst case scenario can at least make things a whole lot less chaotic.
It doesn't matter your age, how much money you have in your bank account, your marital status or what you do for a living, we all want to be more successful in our lives.