The Nagual called the moment when the second attention hooks onto something stopping the world. (Ring, 294)

Once you can stop the world you are a gazer and since the only way of stopping the world is by trying, the Nagual made us gaze at dry leaves for years and years. I think it is the best way to reach our second attention.
Once dreamers know how to stop the world, they can gaze at other things; and finally when the dreamers lose their form altogether, they can gaze at anything:
– small plants
-trees
– moving living creatures like insects
– rocks
– cyclic phenomena, like rain and fog
– distance and cloud gazing (not thunderheads) [Genaro was a thunderbolt sorcerer]
Fire, smoke, and shadow
– stars
– water, especially running water
(Ring, 295-300)

Don Juan had also said that once we stop our internal dialogue we also stop the world. (Ring, 306)