Strategies to overcome "academic-apathy" in the final stages of the PhD? Background - I am doing my PhD in atmospheric physics/photobiology.

Here is a scenario:


The experiments are complete - the results are far better than expected 
Successfully got the computer program to work properly and have developed another
Papers are published
Much of the thesis is drafted


The light at the end of the tunnel is most definitely no longer an oncoming train.

But, at this stage, you just don't feel like working on the thesis, you do other things like cleaning, reading, watching movies - procrastination gets worse, and worse despite the submission deadline coming closer.   

The procrastination resulting in more apathy towards the project, despite being fully aware of how much work has been put into the project, how much has been achieved and how little, comparatively, needs to be done.

What strategies are there to overcome this academic-apathy, particularly in this late stage of the thesis?
Here is what kept me motivated and got me through the last year of my PhD:


A comment from a professor that the best dissertation is the one that is written.
My advisor kept pushing me to get her chapters.  I'm not sure where you stand with your advisor, but if he/she (and your committee as a whole) wants you to finish up, that can be motivating.  If you want to push this angle, send out an email to your advisor and committee with your plan to finish -- that will help keep you working!
I had set a deadline for myself (as mentioned in point 2), and backed all my planning up to make sure I met the deadline.  It sounds like you've gotten to the point where it is just the writing you have left, and I suggest setting up a schedule of when you will complete each chapter.
My deadline revolved around the job market -- I knew I needed to be ready to start at a job in August, so I knew I needed to be completely done by then.
I took breaks when I needed to.  I treated myself to a day off when I got a chapter completed and sent to my advisor, and I had one weekly TV program that I watched religiously.  Finishing a PhD is a lot of work, but it doesn't need to be soul-crushing (and soul-crushing work is bad for you, anyway!).
I really wanted to see the finished product -- I thought it was cool to have this giant, polished document, and that kept me tinkering on it.


Good luck!