I understand the problem intellectually, of course. Starting a new story, or chapter, or even just a scene can be daunting. It represents a mental shift from whatever came before, but this isn't the only issue, at least in my case. I usually have all the main plot elements set in my head when I sit down to write something, but I never have all the details down pat, so while I (generally) know what's going to happen, I don't necessarily know how it's going to do so. Which makes it difficult to write the scene.
Each writer deals with this in their own way. My personal method for places in which I'm stumped (and one that I have found effective) is to decide how the scene is going to transcur, and then not write it. How? Easy: I think about the scene for a while, create a road map in my head, and write only the first sentence or two, and then set it aside. This method allows me a certain amount of time for my subconscious to reject or modify anything truly horrible in my plan and also has another huge benefit: when I return to the piece there is no longer a blank page looking back at me from the monitor. It is now just a question of adding words to a piece that's already under way - something we can all do!
This method might not work for everyone, and I'd love to hear what each of you does.
Other news includes the fact that I wrote 85 words over the weekend (which is better than my usual weekend count of zero), and also watched The Battleship Potemkin. This is a Soviet propaganda film from 1925 which was once selected as the greatest movie ever (by a western panel). Time has made it quaint instead of powerful, but I can understand why it was once censured for both its violence and its political content (banned in Britain until the seventies). An interesting and very educational look at how to make a good propaganda film (essentially, keep it low-brow and make it very clear who the good guys are and who the bad guys are through both actions and characterization!).