Emotional processes play an important role in every aspect of life. Smiling, for example.
How Smiling Affects the Brain (Change Your Mood)

Emotional processes play an important role in every aspect of life. Smiling, for example.
Beyond signs from the universe or coincidences. How Do You Know if You're on the Right Path? How Do You Find Your Life Path?
When sleepiness sets in, a nap could be part of the solution to your reduced nocturnal sleep.
When does R (REM) sleep occur?
what's important to break and start habits.