I generally try not to go without sleep if I need to be up, but sometimes if I have to do something particularly nerve wracking the day after (e.g. presentation, exam) I may not get any sleep due to nervousness. I've since learned to simply get on without much sleep. Really it's all about rousing yourself after a bad night's sleep since the body will still want to keep you in that drousy state. Once you are awake fully then it's easier to handle yourself during the day, so the second you get up it helps to just start doing activities rather than taking things slowly. Even if your head does feel like a ton of bricks.