Dear Mr. Crisp,
I haven't read about the meditation you mentioned, although I've been told stories about people waking up, staring in the mirror and thanking themselves for giving themselves 'one more day.' I doubt it affected me in any spiritual sort of way on a large scale, but I've thought about it from time to time. I honestly can't tell if I was lucid or not at the time. It's the kind of imagery that usually only happens when I'm awake, but it felt sort of like I was just there viewing it all. I was watching from outside, then suddenly got sucked in, I guess.
As a very loose rule, I try to do my best to meditate before I sleep each day. Most of what I know about meditation was material from a man named Andy Cohen. I have no idea whether his claims of enlightenment are true or not, but the things he claims tend to make a lot of sense to me, so I try and incorporate things into my methods. I do this fairly unsuccessfully.
The method I invariably use is to first calm myself, then imagine my surroundings. I try to think of as many details as I can while viewing them all simultaneously, and then try to talk to myself in my head at the same time. By talking to myself, I just mean to think of whatever comes to mind normally and realize I'm thinking it while I think it.
I do this for a while until I fall asleep. Typically I have no particular goals, either in real life or in my dreams; all I know for sure is that I have some ridiculous dreams on a fairly regular basis. They're usually so strange and outlandish that they delight me, whether they're scary or happy, but occasionally I have one like this that I just can't explain.
Black holes, very pale individuals with white hair, and various monsters that I have to battle tend to pop up a lot.
Edit: I just remembered what first led me to spirituality, which could possibly explain the tunnel. When I close my eyes, I see a large amount of varying color--mainly green, but also blue, purple, and white dots. This from a scientific view is something called phosphenes..... and if I focus on the white dots and keep my eyes centered on one specific dot, my peripheral 'vision' (with closed eyes) starts moving toward me and gives me the sensation of being in a tunnel.
I hope that helps, and I apologize for the massive bricks of text.