If that fails, re-evaluate your life and introspect how all these deadlines mean that something is ending, giving you an opportunity to either do something better or just give you more free time/sleep.
But about 1cm of it in the bottom of a french press, and about 2cm of milk in the bottom of a 20oz glass. Mix.
Then add a few squirts of peppermint. (like 4 squirts).
I'm serious, this concoction has gotten me through more all-nighter-afters than anything else ever.
In all seriousness though, just take a nap and realize that in the grand scheme of things what you're working on is probably not that important. I always recall one particular chapter in Bill Bryson's "A Short History of Nearly Everything" where he outlined the fact that the human race somehow survived something like 7 extinction periods. That always puts things in perspective for me.
Just be happy.
Living with a pair of hackers, I frequently run about asking technical questions or getting them to review bits of code. It makes the process a lot faster, and speed helps getting things done.
Good luck to you, mate. I would keep working and only refresh this page every hour or so -- only other people with insane workloads are still up ;)
* Go for a run.
* Then take a cold shower.
* Then dose up on caffiene of your choice.
But please don't do stuff like this often - if you're always working like that - then just go to bed.
In your spare time, read Getting Things Done. Even if you don't like the book, it's decent advice.