Visualising random objects starting with a given letter helps with sleep.
<br /><a href='https://www.bbc.com/future/article/20260311-cognitive-shuffling-the-micro-dreaming-technique-that-helps-your-brain-to-rest'>https://www.bbc.com/future/article/20260311-cognitive-shuffling-the-micro-dreaming-technique-that-helps-your-brain-to-rest</a>