We all want to be happy. But we sometimes think of happiness as a thing that happens to us — something we have no control over. It's easy to link the idea of happiness with the situation we're in. We might tell ourselves, "If only things were different, then I'd be happy."

But that's not really how happiness works. Research shows that just a small portion of happiness (only about 10%) depends on a person's situation. So where does most of our happiness come from?

Part of happiness depends on personality. Some people have a naturally happy nature. We all know people who are cheerful and optimistic most of the time. Their upbeat personalities make it easier for them to be happy.

So what does that mean for people who are born with a personality that's on the grumpy side? They might see the faults in people and situations instead of the good. Their mood might be glum more often than it's cheerful. But if they'd like to be happier (and who wouldn't?), it is possible to get there.