Start With a Fifteen-Minute Walk

The blank page is rarely the problem. The problem is that most of us walk through a wood or along a canal with our attention half elsewhere, then try to write about it from a memory that has kept only the outline. A short, deliberate walk fixes this better than an ambitious one. Fifteen minutes is plenty. What matters is that you stop three or four times, and that you record five specific things before you get home: three colours, one sound, one texture. That is the whole brief. Everything else is embellishment.

Take a notebook small enough to hold in one hand and a pen that works in the damp. A pencil is fine, and in cold weather it is better, because ballpoints stiffen and gel pens skip just when you need them.

Colours: Name Them Like a Paint Mixer

"Green" and "brown" are not descriptions; they are categories. Your eye has already done the interesting work — the writing just needs to catch up. Next time you are standing in front of a hedge, ask yourself what the green is made of. Is it yellow-green, like the inside of a lime? Blue-green, like the underside of a wave? Grey-green and dusty, the way lavender goes in August?

• Borrow from objects: mustard, slate, rust, custard, tar, pigeon grey, damson.
• Note the light: the same leaf is a different colour at eight in the morning than at noon. Write the time next to the colour.
• Look for the second colour: most things are two colours at once — a leaf with a pale midrib, a stone with an orange patch of lichen.

If you carry a small tin of watercolours or a few coloured pencils, lay down a quick swatch in the margin. A row of five little squares takes twenty seconds and will tell you more in a year than a paragraph of adjectives. Failing that, tear a corner from a paint chart or a seed packet and tape it in.

Sounds: Write Down What You Normally Filter Out

Most people record birdsong and nothing else, which is a bit like describing a city by listing only the church bells. Note the whole soundscape, including the parts you would rather not have.

• Bird calls, properly: not "birds singing" but "the two-note whistle of a great tit, repeated, slightly bored".
• Weather sounds: rain on a hood, wind combing through a stand of reeds, hail on a car roof.
• Human noise: a distant mower, a gate closing, footsteps on gravel. These date an entry beautifully.
• The gaps: write down when it goes quiet. Stillness is a detail, and a rare one.

Two habits help. First, describe the rhythm as well as the tone — is it a drip, a run, a rattle? Second, use onomatopoeia without embarrassment: "churr", "seep", "clack". Nobody is marking it, and it is often the fastest way to get a sound onto the page.

Textures: The Sense Most Journals Ignore

Touch is the sense that gets left out, and it is often the one that brings a memory back fastest. Run your fingers over things. Then write down four facts: what it felt like, how cold it was, whether it was wet, and what it left behind.

Bark is a good place to start, because it varies so much within a few metres. Sycamore is smooth and slightly cool, like the back of a spoon. Oak is ridged and warmer than you expect. Birch peels in papery curls that crumble between thumb and finger. Add the small consequences — the faint grey dust of lichen on your fingertips, the resin smell that stays with you, the scratch on the back of your hand from a bramble you did not see.

Then extend it. Wind on your face, sun on the back of your neck, the shock of cold water through a boot, the weight of a wet leaf in your palm. Write down which part of you did the touching. It sounds fussy; it reads vividly.

Smell and Air: The Fastest Route Back

Smell bypasses the sorting-out part of the brain and goes straight to memory, which makes it disproportionately valuable in a journal. It is also the hardest to describe, so keep it plain. Petrichor after a dry spell. Crushed pine. Wet leaf litter, which smells faintly of tea. Hot dust on a path in July. Cow parsley, which most people cannot smell at all until they crush a stem.

Alongside smell, describe the air itself — still or moving, heavy or thin, colder at ankle level than at your face. Air is what makes an entry feel like a place rather than a list.

A Simple Structure for the Page

When you get home, do not transcribe your notes in order. Give each entry a five-line frame:

• Where and when: place, date, time, and the weather in six words or fewer.
• One thing seen: a single colour, and the light it was in.
• One thing heard: with its rhythm and its distance.
• One thing touched: with its temperature and what it left on your skin.
• One line in the present tense: what you were doing when you noticed it.

Write in the present tense where you can — "the wind comes up and the reeds lean" reads more alive than "it was windy". Keep to one simile per paragraph, because three comparisons in a row cancel each other out. And keep a page at the back of the notebook for words you liked but did not use. On the next walk you will find a home for "sallow", "mizzle" or "brindled".

Read an entry back a fortnight later. The test is not whether it is well written; it is whether you can smell the path. If you can, the details did their job.