If you would like to progress quickly along the spiritual path through meditation, do not go to a Vipassana retreat.
Do not practice transcendental meditation.
Do not learn from a teacher whose central teaching is mindfulness.
These are all inferior methods that will likely slow down your progress for years, leave you stuck in meditative eddies, leave you feeling frustrated, and will likely lead to you giving up on meditation as a transformational practice.
I have seen this happen to too many people.
There are many far better options for learning how to meditate.
For the sake of all beings,
Heed these words of caution.

Also published on Medium.