Zazen (shikantaza) expands awareness, eyes open, allowing thoughts to come and go, without holding on to thoughts, while maintaining full breathing and balanced posture.
Kundalini yoga sounds interesting.
That's what I thought zazen was supposed to be, but that's not how they're practicing it. When using the "counting your breath" approach, as I always had, they now insist that I start over whenever I hear something external, instead of of just noticing it quietly and going on counting, the way I always had. (Which works, and *does* create a certain amount of awareness.)
Their way, I never get to count past "1," and it drives me crazy! I eventually just get disheartened and stop.