A playlist of sad songs may be cathartic and help you get your feelings out. Alternatively, listening to upbeat, happy songs ...

Realise what makes their friends feel happy or sad. Recognise how other people feel ... mascot Gully the Seagull performs this upbeat Super Mood Movers song about the importance of staying fit ...

If you need a long-lasting boost, this is it! A little dark chocolate goes a long way - it triggers endorphins, aka your brain's happy chemicals. One bite = instant mood lift. Blueberries, ...