My suggestion for you is to go out and take a long walk in nature/parks. Even take your digital camera and take shots of various subjects of interest. Or go find a big tree and lean on it/hug it and stay there for several hours.
All I know that when I'm feeling bored, I just go out and take a walk on the waterfront and take shots of subjects of interest. After the long walk, I feel energized and enthusiastic about everything. The cause is that when going out in nature, the nature takes care of you and charges your batteries so to speak.