We can learn a lot from the habits of people living in the “Blue Zones”—the communities scattered around the world where residents enjoy an unusually long and healthy life span. Modern “Blue Zoners” try to live better by replicating and expanding on these good habits, with programs promising less stress, more energy and better sleep.

Our mental and physical health is highly influenced by our environment. Physically, a cluttered house is dirtier, which can lead to allergies and illness. Mentally, a cluttered a house can be a symptom of, or lead to a cluttered mind, which makes it more difficult to sleep.

If you think about it, many of life’s notable moments come with a soundtrack. The music on the radio when you had your first kiss, the music sung at religious services, Pomp and Circumstance at graduation, Pachelbel’s Canon during a wedding, your favorite music to run or work out to, Military taps at funerals for veterans, the sound of a...

We’ve all got that one friend who encourages us to “smile” when that’s the last thing we want to do. But prepared to get even more annoyed because … your friend is right. When researchers from the University of Tennessee Knoxville and Texas A&M pored over nearly 50 years of data—accumulated from 138 studies—they found that there is in fact...