tips for doing homework/studying late at night?

[Ruby]

hey so i did this thing where i idiotically decided that leaving all my assignments and tasks to the last minute was a good idea.. it was not.

i have 3 assignments due this week, maths homework, a science test tomorrow, science tasks (2) and an essay to write. i do not plan to do all of this tonight but i need to get a huge chunk of itnout of the way.

before you tell me that procrastinating is stupid and that at my age i should be getting 9 hours sleep etc - i already know. I'm an idiot and my body clock is out of wack but this is the last week of term and i just really need to smash this work out asap.

facts:
- it's 10:30pm now and the latest i can stay up in order to function tomorrow is between 4 and 4:30am which gives me 5 or 6 hours
- i will be able to stay awake no problem but i have huge difficulty with staying on track/ motivating myself to do the work
- occasionally i decide to take a "power nap" to fuel my brain but i alwayd end up taking about 10 and then just deciding to fall asleep
- i have no access to food/energy drinks etc right now

okay so please please please help me
i just need some tips/guidlines to stay on track and not distract myself with social networking or tv etc and also how to keep myself motivated to do it (i tend to make up excuses alot)

I'm sorry if i sound rude or anything, i am very stressed right now.

Thank you in advance! :-)