Artist/Blogger Lance Scurvin shares a few of his techniques for maintaining his joy as he goes about his day. Perception is everything and how you perceive a situation or even your life makes a big difference in how much joy you will extract out of it.
You are to never allow your surroundings to dictate your joy no matter how bleak others reflect it in their reception of what is around them. You be the judge of your own reality and leave this task to no one else but you and your Creator!