Find out where you stand in the world.
It's human nature, but we seem to be worse about it in the U.S.
I am referring to the desire to always have more. Those making $30,000/year say they'd be content if they could just make $50,000/year. BUT, those who make $50,000 aren't happy and say they need $75,000 to be happy. It continues from there. Multi-millionaires and billionaires even feel they need just a little more to be where they want. It's neverending.
Put your household income in here; and I challenge you to not be humbled. Even those making minimum wage... scratch that, even high school girls working as part time babysitters in the U.S., are rich when it comes down to it.