Hi Koturu
A year of writing up isn't a long time and you have no time to waste. I've been writing up solidly for the last 9 months, working at least 12 hours most days, and will still be really, really pushing it to get this thesis done in a year. Don't forget, you might think you only have another 70 000 words to write, but your sup is likely to make you rewrite these, so in actual fact, you could be looking at more like 200 000 words. I will have rewritten everything completely at least twice - so writing 100 000 words three times.
Do a search on the forum on 'procrastination' - there's been lots of threads on this. Have you got a detailed plan for the next year? When each of your chapters will be done by, given back by your sup, when the next version will be done etc? Do a yearly plan, then monthly, then break it down. You'll see time runs out and the fear will make you to get going! Treat your PhD like a job, and put in the hours. Motivate yourself with rewards. Work in small increments, focus, then have a break. I've found the 25 minute timer at http://mytomatoes.com/ to be an essential tool.
Good luck! Keep us posted!