My advise is to regimentally write everyday for a period. Write anything, knowing full well that none of it will ever be used at all. The practice of actually putting words together is something which once you fall out of practice becomes daunting very quickly. While I was writing my thesis for example I was writing lyrics, short stories and posting extensively on here, writing became almost relaxing and it was really easy to connect my brain to my fingers, I also got better at typing which was handy. Think of it as training, once you are in the habit of writing you start to make progress at actually expressing yourself properly and once you start to write every day it becomes much easier to discard things which aren't worth continuing with, things you produce during a bout of writers block start off as life rafts and ultimately become albatrosses.
