How to stay awake all night?

Getting enough sleep the night before and drinking enough of water are the first steps to staying up all night.  Eat light, energizing snacks rather than large meals, walk around frequently and use bright lighting. Although caffeine might be helpful, use it sparingly to prevent a crash. Modalert 200, also known as modafinil, may be recommended to you in order to encourage attention and alertness if you must remain awake for work or school. It is frequently used to treat narcolepsy and shift work sleep disorders. Modalert 200 should only be used under a doctor's supervision, though. All-nighters should not become a habit since they might interfere with your health and normal sleep cycle.