When I'm in bed and pretty tired I usually experience what can best be described as "half-dreams".
It's not like daydreaming or a regular dream, but something in-between. I daydream about something, and then (again: this pretty much only happens when I'm tired) it turns into a "deeper" form of daydream that I cannot control (it works by itself, kinda like a regular dream).
I can, however, end the half-dream (instantly) by opening my eyes, or start thinking about something.
From what I can remember I'm not really self-aware during these, so it's not like watching a movie, it's more like your mind being lost in a daydream (but it's more than just a daydream).
It's mostly when I suddenly realize something (it can be pretty much anything) that I become self-aware and can choose to end the half-dream or let it contine (if I choose the latter my mind "gets lost" again rather quickly).
It feels like these "half-dreams" are a stage between daydreaming and actual dreaming, so I was wondering: do you guys think I can use them to achieve lucidity?