You’ve probably heard about Random Acts of Kindness before, or maybe you’ve even been on the receiving end of one. If not, they are exactly what they sound like: a kind act that you randomly do for someone, like telling them how much you appreciate them, bringing them coffee, or even just letting them go in front of you at the checkout line. Research shows that random acts of kindness, even when done anonymously or to complete strangers, increase happiness on both sides. After all, happiness can be contagious, so what better way to boost your own mood than by cheering someone up?