Whilst this article [here] presents this as a new ‘trend’, the use of progressive relaxation with calming techniques (involving breathing and mental strategies) has been used successfully for many decades to help with falling asleep. I have provided some recordings on my resources webpage [here] which describe this form of approach. These were recorded some 30 years ago (and so could probably be helpfully updated). However, as noted in the article, it can take longer than two minutes to have the desired effect.