My advice is:
a) set yourself a start date (rather than an end date)
b) do something everyday towards your EdD – however small: make notes on your most recent reading, get hold of references, outline your view of a particular subject – if you do something daily it’s easier and quicker to get down to it when you have an extended period of time
c) read for at least 10 minutes / 30 minutes / 1 hour everyday (once you get started you won’t want to stop)
d) let your pre-writing rituals be productive
e) you could try to turn a vice into a virtue!