I did the same thing last weekend. Even though I could feel an impending doom and clearly envisioned a week full of late nights, early mornings and overall disasters, I just didn't get to work. To be honest, I still haven't.
I don't think I'm realistically going to do anything (other than writing this) right now, so here's a list of things I've compiled to make sure this never happens again.
I hope this helps you, and I really hope that it helps me next week.
1. Envision how you'll feel after the task
I'm not sure where I heard this, but if I can envision how I will feel after doing a pile of work, I think I would be much more likely to do it. This effect will probably double when I feel how relieved I will be over the week.
2. Recognize that you're procrastinating.
Given that it's been a few weeks, I think I can probably do that.
3. Change your environment
Chances are that if I stay in my room, I will probably clean it (thanks mom!). Leaving is probably the best option.
4. The Pomodoro (Tomato) Technique
This works really well for me when I'm studying. You can use this timer!
5. JUST DO IT.
At the end of the day, I could write a thousand more articles and read a million more. But at some point, I just need to take action.
I hope you (and I) do that right now.