Hi G_Mojo,
Well going through the book he has these recommendations:
* first get comfortable with the belly breathing
* next he says you can directly move to forehead and eyes, particularly roll the eyes and that you can do these at the beginning of any sessions till they are "cleared"..
So I usually start like that.
I do focus on eyes, forehead, jaw, tongue.
I try to be very attentive to all the "wrong" examples he gives. Sure enough if I don't pay attention, my mouth is nearly always closed. Such a simple thing to keep a mouth slightly open right? And yet when I check with a finger my teeth are nearly touching. So I often start session 5-10 min breathing checking mouth, checking the ah sound, checking with my hand that I am belly breathing etc.
When doing so I definitely notice after 20-30 min that the "ahh " relaxes. I also start noticing that tension in the belly relaxes. Funily enough, I noticed after sessions now I need to pee, and I feel like I can pee much more easily... feels really good like a 5 year old pulling his pants and just letting it out

A really misc; observation.. I don't know if this involves relaxing the prostate, or maybe it is releasing chronic tension in the belly.
What I have found is am am MUCH more aware now of tensions throughout the shoulders, face and especially the throat. This technique helps a lot brining awareness in those areas. Even just that for me has been more effective than Vipassana.
Regarding the throat a positive example that happened yesterday: I was a store and wanted some slices of ham. This woman keeps making really thick slices.. maybe to run the business I don't know. I felt irritated having every time to insist that she makes "thin" slices and the slices she makes are so thick they're like beefsteak it's just stupid especially as I am a regular customer. So my irritation suddenly burst out I made a gesture and expressed in a few words discontentment. She didn't take it bad, made me another few slices. I didn't hold onto the feeling. She asked if I needed something else, I was smiling and just moved on. A simple example... but all my life it seems I have been holding my anger. I think that's all the stress I'm feeling there. I have often felt it with my father.
Now did RT really help here? I'm sure it does. But it is always hard to say. I had a big shout out at my father last year so a process of letting out my anger rather than suppressing it was already slowing happening.
BUT there is a key difference I am noticing here./ With Vipassana in daily life I would tend to notice anger or other unpleasant feelings, and try to "observe" it. To be "equanimous". It's counter productive. I end up often simply suppressing. And even if succesfully, philosophically even, "letting go" of such feelings, the fact remains that in the nervous system, in the emotional system, I don't think it really solves things. Another potential problem when one gets in the habit of being so invested in the internal sensaitons, is paradoxically I think it does sustain the sense of self and emphasize it.
Personally I am done with Vipassana for now and try to put 1h + 15 min "sense and feel" (which is pretty much goenka style vipassana, with eyes open).
Over the last month I no longer have extremely crappy afternoons wallowing in terrible sensations. Instead whenever tensions arise (which is very often, for some reason they tend to peak in late afternoon), I am now far more aware of my posture, of my clenched mouth, of my raised shoulders and so on and immediately can release them and also breathe. Breathing is really key.
But like Vipassana, now this is just my guess, I don't think consciously releasing tension during the day is enough. I think doing a regular 1h practice of this technique is important to teach the body to relearn to smile, to let that mouth open, to breathe, to relax...
Another potential positive point I have noticed is I seem to be back into inquiry or self inquiry seems to come more often. Of course the mood is always on and off and out of my control, but I suspect the release of tension from Reichian Therapy can also sometimes bring back the spaciousness feeling, or wider attention that naturally puts you in the mood to look at experience rather than being fully caught in it.
My routine is like this:
* put on ambiant "rain" 1h track on Grooveshark. When the rain stops I know I can do "sense and feel" 15 min and session is over.
* the rain initally was to add some blanket sound to feel a little more private but also a way to focus (it's a kind of "blank noise")
* I try to stay focused as much as possible, just like Vipassana. If the mind wanders, bring it back. It seems to me the attention to tensions in the body while belly breathing is key. You could go for an hour with a tensed throat (a very tense "ahh"), as well as clenching various muscles without even realising.
* I have the book on iPad , fortunately the Table of Contents works well so I can simply tab chapters to move back and forth.
* I often set 3-5 min timer to any exercise, place down ipad, rinse repeat.
* Without tablet I imagine it quite unpractical even in book form to have to hold the pages open... but you could maybe print simply a summary list of the chapters or key exercises people shared earlier.
I think a good routine could be to start
5 min belly breathing checking with hands that you are not puffing the chest
5 min roll the pelvis,
then go to chapter 11 : forehead , roll the eyes, and eyes in direction
Then honestly I do a bit of everything, usually 3-5 min at a time.
I don't yet do much with shoulders or legs as It is not practical for me to kick around near the wall

I should probably also mention, at least for me, it really isn't very pleasant to do. I often feel very uneasy when I start. Sometimes there is a strong buzz from the hyperventilation, sometimes less so. Sometimes I got really hot so now I always put a towel on the bed and do it in underwear just like in the book photos.
Checking continually that you do keep the mouth open and don't clench muscle at same time as exercise ("fused" muscles) I think is key. You could do the eyes in directions thing and nothing happens. Couple weeks ago I was doing that and kept putting a finger between the teeth to stop closing the mouth and breathing properly and burst into tears and felt quite a bit of stuff coming up.
Something I noticed lately is you can also mentally relax. Just keep a light smile (mouth open) when breathing .. after 12 days interruption I found I could need as much as 30 min to finally relax the throat. When you do finally relax the sound really changes. As well as the self consciousness (like "maybe people next door can hear me making these weird sounds").. that goes away too. Or if you talk aloud as you read the book (happens sometime) you notice straight away the voice becomes louder and clearer rather than being held or limited.
Oh yeah looking at my log I seem to be more relaxed when talking to young women at the store ;)
Earlier in the month I seemed to notice a little bit the "clearing forehead" benefits jack Willis mentioned. I felt a little more spacious, as I did during more intense self enquiry periods. it comes and goes though. But in the same thread, it's made me aware also that there is indeed tension even in the forehead. Often during session I noticed this weight on my eyelids, and they keep twitching like there is something bothering them.
But yeah I'm afraid I don't have any single story of "success" or significant change. Something that I noticed over the years, which is very annoying but the nature of things.. is that feeling good is the natural state. And hence, even if you were to change a behaviour that was limited for all your life... you naturally simply don't notice it. Only sometimes days or weeks later you go "oh... i didn't use to talk like this"... or whatever... and even as you notice it is seems odd somehow that things would have been different. So that makes it all the more difficult to see the positive change

Sorry for the disorganized post. Just random thoughts.