In the cold winter months sitting cozily on the couch wrapped up in a blanket is much more appealing than going outside in the wet, cold, maybe even snowy day. But it’s important to force yourself to bundle up, and get outside even when the temperature drops to somewhere around freezing. Studies have proven that going outside boosts creativity and improves your mood. It also gives you much-needed vitamin d—yes you will still get vitamin d even if it’s cloudy. So take a stroll in the cold, it’s good for you.