Get ready for an attitude adjustment. Being a “negative person” or a “positive person” isn’t set in stone — and using a really simple trick that anyone can learn could change your mood, your ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Christine Cyr Clisset, Caira Blackwell, Rosie Guerin, Abigail Keel and Doug ...