My superficial suggestion: Sleep, diet, and exercise. Cut everything else out until the task is done, provided the task holds that level of importance to you.

My superficial suggestion: Sleep, diet, and exercise. Cut everything else out until the task is done, provided the task holds that level of importance to you. Sleep will help your brain, exercise will energize you (even if it's just a brisk walk), and food will sustain you. Sometimes it's easy to overlook the basics—the foundation of quality effort. My real suggestion? Take a step back and consider whether the environment around you will keep you healthy and happy long-term. Burnout charges interest, and if your environment doesn't afford you the opportunity to repay that interest, you'll spiral into psychological and physical bankruptcy. So before finishing this project, take a physical step back, look at your environment objectively. Is it going to bankrupt you? If yes, seek to remedy the situation immediately and forcefully. If no, see my superficial suggestion and get to work.