You are as small as it.
You are as temporary as it.
... but right now, you are here.
Be startled by a deer.
Players gather at a golf course, wielding a club of some (any) kind.
The first player to knock a ball into each hole of the course wins.
One player describes a coastal place solely through imitations of the sea.
The other players guess the place, the describing player may only answer in sea noises.
Spend a week offline deciding how important a week of unread internet correspondence is.
Go on a journey.
Use the name of each place you travel through, each landmark you pass, to build a narrative of your journey.
example: I put on my waterproofs at Jacket Point. The heavens opened at Raine Point etc.
Don't be too concerned about accuracy. The story is more important than the facts.
In private, practice a short phrase out loud until your pronunciation lends it an infinite profundity.
Never test it on another soul, in case the impact is too strong.
Everything you own is damp. What is the standard scientific measure of dampness? Rank each item on a carefully calibrated scale. Everything you own is still damp.
Everything you own smells. What is the standard scientific measure of smelliness? Rank each item on a carefully calibrated scale. Everything you own still smells.
Every part of you aches. What is the standard scientific measure of ache? Rank each item on a carefully calibrated scale. Everything part of you still aches.
Make a decision on which of several nearby campsites to stay the night in. Make the correct decision, but do as little walking as possible making your mind up.
Hard Mode: You must guess their specific greeting.
Friends Mode: Try to get everyone to greet you.
Go to somewhere really wild, remote, alone.
Scream something ridiculous into the wind. Try your best to maximise volume on your first attempt, don't 'warm up' into it.
Wish a seal good night.
Find something beautiful in a spot where others will miss it.
Leave a note, hidden or public, permanent or temporary, that will bring that beauty to somebody else.
Collect 100 cobwebs with your face. Do not flinch or brush them away until you are done.
Distinguish from the sounds around you the waves on a pebble beach, the nearby songbirds, gulls crying in the distance, the rustle of the grass and your clothing, slick footsteps in dewy grass, and the arrhythmic even tone of the sea buoy.
Spend weeks gradually piecing together the words for a poem or song you once knew by heart.
Make a video game using for sounds only snippets from a field recording of a skylark.
Without consciously realising what you are doing, create a ritual or superstition about a plant you don't know the name of.