Visit a wood. How far can you walk in a straight line without bumping into a single tree?
Imagine all the things around you have never been discovered before. What would you name them? Start a small field notebook and fill it with sketches of your newly named findings.
Make your way across this bridge without touching, hearing, tasting, smelling or seeing an insect. If you do, start again!
As you pass through this bird reserve, mark each bird you see, hear or sense out of five on different criteria. You can judge them on how pretty they are, how good they sound, how big their poops...