I use my own secular simplified technique inspired by Tibetan dream yoga and wake induced lucid dreaming (WILD).

It’s as “simple” as learning to remain aware and observant when falling asleep, without rousing oneself. No deity worship or chakra alignments necessary.

Meditation practice helps tremendously, but my first success, I accomplished by trial and error.

A lot of instruction on the Internet suggests focusing on something, visualizing something, counting, eating supplements, etc. I have found all of that unnecessary.