Sun

It's like this:
When the sun shines, everything becomes a little bit better.
A smile is more joyful, food is tastier and trees and flowers look bloomy and wonderful.
Nature smiles when it's bathed in sunshine.

There's no better way of treating a blue mood, than to sit in the sun, taking deep breaths and just experience everything around you.
It's almost like a chemical reaction happens, targeting all the bad stuff inside you, and then killing it by blasting you full of happyjuice. :P

Useless blog-post is useless, but I don't care.
THE SUN IS SHINING!