Here’s something really simple you can do to instantly be happier: Go see a friend. If you can’t see them in person, give them a call.

We probably don’t need to tell you that spending time with friends makes you happier but new research shows just how important that is:

…low social interaction has the equivalent lifespan impact as smoking 15 cigarettes daily, or being a raging alcoholic. Cutting yourself off from others is worse, even, than inactivity. And twice as bad as obesity.

Can you find a half hour to catch up with a friend for coffee today? If not, even making plans to see them can boost your (and probably their) happiness.