It may seem ridiculous to suggest that you have time for anything other than upcoming finals, performances, juries, work, homework, and some semblance of a life, but you do.
Even if it's just 10 minutes a day, do something that gives you pleasure. Choose something that has nothing to do with your major, your work, your everyday life...just choose something you enjoy. Lose yourself in it. Notice how you feel afterward, and notice how your return to your work with a greater sense of purpose.
My hobby is calligraphy. I'm not as good as I used to be, but I've found coming back to it great fun. You could try painting, drawing, calligraphy, reading something not for school, or any number of things. Consider picking something you haven't done since you were a kid: you might find a special kind of joy in revisiting something that ignites your inner child. The point is to enjoy, not work at it.