Just a small addition to my original supplies list:

Dual caffeine/water source: Dr. Pepper
Food-like substance: Instant ramen, sheer force of will.
Music: Rainbow, Kansas, Saga, the 1982 Broadway production of Sweeney Todd, Les Mis 10th anniversary
Clothing: Labcoat (For the psychological benefit), pants optional.
Furniture: Exercise ball, for sitting. Staves off back pain for a good while.
Additional tech: second monitor so I can keep an eye on the IRC, 3DS (game of choice: Fire Emblem: Awakening) for power-breaking.