The science is in, and the path to a longer life is astonishingly easy to follow: Live exactly the way your great-grandparents did -- but do yoga, too.
Get-it-done grit is necessary but not sufficient to attaining success in life. That which you do must be worthy of your precious time, and that's a determination only you can make.
It could be your job, your office environment or even extenuating circumstances in your personal life. Whatever the case, the first step to solving a problem is figuring out the root cause.