It’s that time of year already? The holidays are over, the twinkly lights are down, and we’ve all already cheated on our New Year’s resolutions in one way or another. There’s nothing romantic about the snow when you’re trying to dig your car out of a foot of it. Valentine’s Day is still out of sight, and spring is an even more distant dream. Mid-January is the worst.

I always find myself in the worst shape around this time of year–tired, grouchy, and constantly freezing. My mom used to call it...