Earlier quoted context omitted.
For those who this does not work.. Try tapping your forehead with forefinger while counting up to the time you want to wake up just before you close your eyes to go to sleep.. eg to wake at 6am... tap six times while saying "1, 2, 3, 4, 5, 6" Repeat 2 times, (3 times in total)
There’s a term / name for this method. Emotional freedom technique (EFT)?
Seems it is for relieving emotional stress but i had only used it specifically to wake up at a specific time.