#13. You're the only person truly responsible for your happiness

We humans always seem to think that happiness comes from outside of us. A friend, a partner, a lovely day, a good job. And it's easy to blame other people, other things, outside forces for our mood when it's down. But ultimately, we are responsible for our own happiness. Recognise those things within your control and act to change them if it will make you happier. Those other things that really outside of our control? Well, let them go. If they're not in your sphere of direct influence, then don't let them influence you.