Try feeding off of something that inspires you, say a favorite TV show (like House 8D) or a friend or a rock star or a parent that you think is really cool. What kind of energy o they give you? Do they compel you to do better or get a certian emotion? Justr because someone inspires you doesn't mean they have to spark nice emotions. Some people (like bullies) can inspire you to be angry and do something about their bad behavior. Perfect for an angsty scene, just focusing on a particular emotion someone gives you and going with it.

This is an age-old trick, listening to music that matches the kind of feeling you have. If you feel angry, chances are listening to "angry" music will make you feel better (then again I don't know you personally but, eh, whatever). So lets say your in a battle, and you're at the height of excitement. You're going to want a fast paced song like Ment to Live by Switchfoot (just throwing something out there). That might be good for a scene where Character A is mad at Character B for ruining Character A's life. Or something like that x) idk.

Sometimes we just need a break. Forcing ourselves to do something is bad, it enforces a bad feeling and we'll somehow get it engraved in our minds that this activity is bad and not want to do it (muselessness explained) so sometimes we need a break. Now, I know from personal experience that this does not always work. Following the above options may be better for you.

Do you have a certain hobby like writing, collecting stamps, drawing, or some activity that makes you feel energized and active again. Some people like to go out shopping with friends or on a hike or play frisbee with the dog. Do something besides sitting on your duff, get up and get active! Go out and have fun! The world is our play ground.