How important are social networks to your happiness? Perhaps even more important than you realized. A recent 20-year study of more than 4,000 people showed that happiness is influenced not just by your immediate friends and family. The happiness of a friend of a friend of a friend -- someone you’ve never even met -- can also influence your happiness. It turns out that happiness can spread through social networks, like a virus.

So today, spread a little happiness. Call a friend or relative you haven't spoken to in a while. Use Zenofon to call them cheaply, so you have money left over to buy yourself a cupcake. Cupcakes promote happiness too, I'm sure you know that already ;)

Get your friend to join Zenofon too. It will make them richer AND happier.