The only Hub/Dream related thing I've ever done is something I've done two or three times:
I'll be asleep, and I'll be writing up a storm in my dreams. In the dreams, I'm writing and writing and feeling really good about much writing Ive gotten done and what a good Hub it is. Then I wake up and realize it was all dream-writing, and the great, almost-finished, Hub doesn't even exist.
Do I then write the Hub for real? No, because after "putting in all that work", I feel as if I'm finished with the subject and can't muster up the same enthusiasm to write the whole thing "again". I once had the show, The Waltons (with the son who was a writer) on. I recall something he said about what someone had told him about writing: He said (if I recall the wording correctly): "Don't talk away your stories." I've always found that I can "talk away" a subject, which is why I've remembered that line from a show I barely ever watched.
Anyway, apparently, some people (like me, for example) can dream away a real good Hub subject. :)
As for the "personal-development" thing, no. I do all that processing, sorting, and figuring-out in my waking hours. My dreams are usually pretty mundane and non-complicated.