How can I fight procrastination?

I swear I have problems... I have boatloads of work due in 7 hrs from now and I am still procrastinating on Yahoo Answers, Facebook and Youtube AND texting practically all at the same time. I have problems :(. The worst part? I do this EVERY night. Sleep when I come home, wake up at 12 AM, stay awake until I come home again about 19 hrs later. I need sleep. I need to do work. I know this. I won't do this. Why?!?!?! D: More importantly, how do I fight this? I'm in High school and taking college at the same time... so my workload is harsh and I pass out at school sometimes. So it's really important to do work on Time for me. :/