By Gretchen Rubin

This proposed happiness resolution is easy. Go outside.

Go outside into the sunlight; light deprivation is one reason that people feel tired. Research suggests that light stimulates brain chemicals that improve mood and increase motivation.

For an extra boost, get your sunlight first thing in the morning.

Now, I’m the kind of person who loves to sit around the house in my pajamas. If I can manage it, I enjoy the occasional day when I never step foot out of my apartment. But even though I love staying in, there’s nevertheless something slightly oppressive about being inside all day.

And going from your front door, to the car door, to the office door, and then in reverse, isn’t much better.

At least for me, unscientifically speaking, spending... More...