20 Things to Do When You're 30 That Will Make Life Better at 50

". . . Happiness is what matters far more than worldly success," writes Quora user Robert Walker. "If you are content with what you have then you may be a bit less likely to end up a millionaire, but you will have a happier life. And if you do become a wealthy person — is no reason why not, you'll be a more happy, fulfilled and productive wealthy person."