Notice a smell that takes you somewhere else entirely

Sensory noticing

Let rain hit your face without flinching

Sensory noticing

Count how many different birdsongs you hear at dawn

Sensory noticing

Count every clock you pass on one walk

Sensory noticing

Catch the exact moment the streetlights come on

Sensory noticing

Mark the edge of a shadow, come back in two hours, mark it again

Sensory noticing

Go into a bookshop just to smell it