Participate, tinker, experiment, allow (simultaneously and continuously sequentially):
Deliberately (lightly, minimally) attend (or pay attention) to things or raw sensations as such
Effortlessly allow yourself to passively notice whatever you (happen to passively) notice or are noticing
Let go, take a break, daydream, be lost in thought, be lost in memory, be in reverie, forget
Find/realize yourself doing or experiencing whatever you find yourself to be ([just] now already [have been]) doing or experiencing
(Do the above [finding/realizing] minimally, barely there, liminally--back off, let it [the doing or experiencing] be, let it maybe undo itself, let it maybe release [itself].)
(Usually but nothing always, neither encourage nor suppress language/language-ing)