My lucid dreaming has always been when I'm in danger, like this description of a Sadako dream
https://medium.com/luminasticity/beating-up-sadako-82c5fb3f0...
So I've never been able to trigger a Lucid dream in any particular method but often when I am being attacked it's like the adrenaline makes me think wait a second this is a dream. Some times if I get scared enough and wake up from a dream I can then make myself go back to that dream to confront the thing that scared me (but knowing it's a dream so I have the upper hand)