For those of us that can't break down tasks without great effort, things like this are of very, very little help.
Maybe it's just me, but I feel that breaking down tasks is a very natural thing to do, and I would classify it under "common sense", since you don't need any particular knowledge or skills to be able to break down tasks into small pieces. You just need to project yourself and imagine the process and write it down.
Of course, if you are talking about very complex goals to achieve, then it's a totally different story, but most of the short term goals I work with can be broken down in 5 steps or less.