From what I've gathered from the book I mentioned, dream yoga is ideal for revealing this potentiality, showing the ways that we partition our experience in very limiting ways. So we only end up ever seeing our take on things, and not much outside it.
There are some very interesting suggestions of things to do in lucid dreams in that book to soften this habit, including making ourselves as huge as a planet or as small as a cell, multiplying objects, multiplying ourselves into many emanations, slowing down time, etc.
So much investment goes into maintaining sets of qualities, from "me the man who has this kind of body" to "me the distracted meditator who constantly battles thoughts".
Dream yoga seems ideal for suspending some of this kind of limitation.
Unfortunately, it takes a lot of hard work
I asked a lama I know about it. He said you could try such practices on your own, but that the results might be disappointing. I don't doubt that a teacher would be invaluable in this.
I haven't tried the four-step process with the different visualizations every two hours yet. I'm a bit intimidated by it.
I'm just keeping a dream journal for now.