Feeling a little blue lately? A handful of recent research suggests you're not alone.Thankfully, there may be something - or several things - you can do about it.
Researchers have known for decades that certain activities make us feel better, and they're just beginning to understand what happens in the brain to boost our mood.
A study published in the journal Nature on July 11 found that when people were given the option of spending money on themselves or another person, those who spent it on someone else had more activity in a brain area linked to the subjective feeling of happiness.
Scroll down to learn why, and to discover 24 other ways to feel happier.