We all have bad days, but now there is research showing that small changes in behavior can improve your mood immediately! According to Tuesday's Wall Street Journal, simple actions like a quick burst of exercise, putting a little pep in your step, and engaging with strangers can lift your mood.

So, as the saying goes, fake it 'til you make it. Stand up straight, walk a little faster, swing your arms a bit more, and say hello to someone new. Your mood will improve instantly. Magic!