If you want to get more done at work, the productivity gurus out there will tell you that it’s all about having the right system. You need to prioritize your tasks, you must keep detailed logs of how you spend your time, to-do-lists are of course essential, you must learn to structure your calendar and much, much more.

But that’s not where you should start. You should start by liking what you do.

The single most efficient way to increase your productivity is to be happy at work. No system, tool or methodology in the world can beat the productivity boost you get from really, really enjoying your work.

Here are the 10 most important reasons why happiness at work is the #1 productivity booster.

1: Happy people work better with others
Happy people are a lot more fun to be around and consequently have better relations at work.

2: Happy people are more creative
If your productivity depends on being able to come up with new ideas, you need to be happy at work. If people are in a good mood on a given day, they’re more likely to have creative ideas that day, as well as the next day, even if we take into account their mood that next day.

3: Happy people fix problems instead of complaining about them
When you don’t like your job, every molehill looks like a mountain. It becomes difficult to fix any problem without agonizing over it or complaining about it first. When you’re happy at work and you run into a snafu – you just fix it.

4: Happy people have more energy
Happy people have more energy and are therefore more efficient at everything they do.

5: Happy people are more optimistic
Happy people have a more positive, optimistic outlook, and as research shows, optimists are way more successful and productive. It’s the old saying “Whether you believe you can or believe you can’t, you’re probably right” all over again.

6: Happy people are way more motivated
Low motivation means low productivity, and the only sustainable, reliable way to be motivated at work is to be happy and like what you do.

7: Happy people get sick less often
Getting sick is a productivity killer and if you don’t like your job you’re more prone to contract a long list of diseases including ulcers, cancer and diabetes. You’re also more prone to workplace stress and burnout.

8: Happy people learn faster
When you’re happy and relaxed, you’re much more open to learning new things at work and thereby increasing your productivity.

9: Happy people worry less about making mistakes – and consequently make fewer mistakes
When you’re happy at work the occasional mistake doesn’t bother you much. You pick yourself up, learn from it and move on. You also don’t mind admitting to others that you screwed up – you simply take responsibility, apologize and fix it. This relaxed attitude means that less mistakes are made, and that you’re more likely to learn from them.

10: Happy people make better decisions
Unhappy people operate in permanent crisis mode. Their focus narrows, they lose sight of the big picture, their survival instincts kick in and they’re more likely to make short-term, here-and-now choices. Conversely, happy people make better, more informed decisions and are better able to prioritize their work.

There’s a clear link between happiness at work and productivity. This only leaves the question of causation: Does being productive make us happy or does being happy make us productive? The answer is, of course, yes! The link goes both ways