So what are you gonna do?

You need to get outside.  It's green and blue and bright and awesome. 
Celebrate the outdoors and take us with you.

You need vitamin D, nawmsayin?

Get outside to let sunshine replenish your vitamin D.  Rumor has it that Superman replenished his powers from the sun.  Research has it that you can improve your mood from the sun.  So get off the couch. 
Do something outdoors.  Even if it's weird, just do it outdoors.