https://www.amazon.com/High-Performance-Mind-Anna-Wise/dp/08...

and elsewhere I've seen "theta state meditations" that start with calming down and then, for instance, imagining that you are doing a lot of motion in a complex 3-d space like going down a shaft, slide 40 feet to the left, go up some stairs, turn around and run forward 100 feet, fly up into the air, ... Then when you stop you go into a daydreamy state.