the lack thereof

what do you do when you have so much you want to accomplish but no motivation to do it? do you ever have that feeling? i have so much i want to do and more that i actually need to do, but i can't bring myself to do any of it because i've lost my motivation to trudge forward. where oh where can i find it? any suggestions? this lack of motivation to accomplish all the things that are musts and even the things that are wants, is becoming depressing.