Happiness is always relative, but the last we heard, $75,000 was the optimal salary people need to make to be satisfied with their lot in life — no more, no less.
Of course, you may argue that this "rule" can't apply to everyone. After all, there's a different cost of living depending on where you live. Here's how much you need to be happy in the state you live in, according to data from Council for Community & Economic Research.