Difficult people may do more than ruin your day. New research links negative relationships to faster biological aging.
Forget resolutions. Just one word can reshape your habits, your perspective, and the way you move through the year.
It's not motivation, luck, or willpower. Here's what separates those who follow through from those who struggle to stick with it.
What if the part you were bracing for turns out to be the best twist in the story?