Research freewriting. Mark Levy's "Accidental Genius" is a good book on it, but there are others as well. I think your method may work for someone who likes structure, but for someone like me who despises set solutions to just about any problem I would find it very frustrating.

The skill of writing free of distraction, yes what a valuable commodity to be nourished. I've always found it much easier to begin doing work, or at least a rough outline with a simple blank notebook and a pen. It is also useful to pursue this in an environment where you don't necessarily have access to the internet. Once that first distraction hits, it makes it very difficult to make any substantial headway. Or similarly if you have another computer that you don't use all the time, or perhaps one you can devote to just getting work done it would help cut down on distractions. Having a very personalized computer you are familiar with and one which you use to read news articles, contact friends and family etc... will inevitably lead you to recall and wish to pursue those activities when you should otherwise be thinking or writing. But in contrast, having even another very cheap or simple computer that you only do work on would be a constant physical reminder that you were writing, and not socializing. Then of course, once you have done some of the initial leg work, gotten a working outline of what you want to do accomplished, or simply have a substantial end vision in mind working towards that end goal becomes easier; even rewarding as you are able to make headway towards it.