Have you ever noticed how smiling (even when you don’t really mean it) can make you feel better? Or how frowning can deplete your energy and make you feel totally drained? That’s not just something that’s in your head – the fact is that your facial expression actually has a huge impact on your mood and energy levels, strange as it might sound.  If you’re not convinced, there’s science that backs this idea up – it seems that the way you hold your face can trick your brain into feeling different emotions, shifting everything from your stress levels to your…