A small collection of ideas for noticing more on an ordinary walk. No special equipment or distant destination required.
Walk the same route twice
Choose a short, familiar path and walk it without trying to cover a particular distance. On the first walk, notice shapes: a branching tree, a roofline, the edge of a path. On another day, listen instead. The route stays the same, but the notes rarely do.
One precise observation is enough. Write down where you paused and what made you look again.
Keep the notebook small
A useful entry can be only three lines: the place, the conditions, and one detail. A rough sketch can record the shape of a leaf or the direction of a shadow more easily than a paragraph.
Leave room for a later visit. Put questions next to observations so that a guess does not quietly turn into a fact.
Notice what the light changes
Look at an ordinary wall or tree in morning light, under cloud, and near dusk. Notice which edges become clear and which disappear. If you take photographs, keep a similar viewpoint so the comparison is easier.
The purpose is a record of attention, not a perfect image. A few words about the weather can make the record more useful when you return.