Wait, let me look in the box I keep by the computer...

No, not there.

What's it look like? Mine is kinda blue, with a plastic wrapper.

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A lot of times, when I can't get going on one project I'll go to my notebook where I'm always jotting down ideas for stills and animations, and I'll set up a new project. Often the act of doing something entirely new rejuvenates me on an existing project.

If not that, try doing something completely different. Sometimes the brain gets burned out, and going for a walk, or reading a novel, or watching some TV gets it rested and back on track.