Like Petman1325 above me, I suggest you increase your caffeine intake considerably during this time period; soda, coffee, or energy drinks are great means of doing so. Increasing your general sugar consumption might also suffice, but you might want to prepare for a major crash after you've depleted your glucose levels... Lastly, you must have the willpower to complete your 24-hour goal. I've been gaming for extended periods of time - sometimes 48 hours or longer, depending on my mood - over the years, and doing the above has never failed to keep me awake. lol However, I'd say sheer willpower has been my most valued commodity.