Wherever you are, whoever you are, the odds are that you wake up cheerful and get steadily more grumpy through the day - until the evening comes and you can kick back a bit.
Miserable people consistently underestimate how miserable everyone else on the planet is, and therefore feel more miserable. The main reason for feeling crappy? Facebook, of course.
People are happiest at home, and most miserable at work - that's the conclusion of a new study which tracks people’s emotional behaviour through their mobile phones.