Most writing exercises are just prompts wearing a costume.
Natalie Goldberg used to run writing practice sessions in Taos, New Mexico, where she'd give a room full of eager students an exercise so simple it almost felt insulting. Describe the contents of your refrigerator. Write about your hands. Tell me what you ate for lunch. People would shift in their seats, a little annoyed, expecting something grander. Then they'd start writing, and within ten minutes the room would go quiet in that particular way rooms go quiet when people are actually working. The writing that came out of those sessions was routinely better than what the same students produced when given elaborate fictional scenarios. Goldberg knew something most exercise lists don't: a good exercise trains a specific capacity the way a musician practices scales before performing a concerto. The scale isn't the performance. But the performance falls apart without it.
Hemingway told a version of the same story about his years at the Kansas City Star. The newspaper's style guide was brutally simple. Use short sentences. Use short first paragraphs. Use vigorous English. He later said those constraints taught him more about writing than anything else. The rules didn't make him creative. They trained specific muscles, sentence economy and concrete nouns and forward momentum, that he then used for the rest of his career.
I think about this distinction a lot because the internet is full of "writing exercises" that are really just prompts. "Write about a time you felt afraid." "Describe your favorite place." These aren't bad, but they don't train anything in particular. They're open fields. A real exercise has a constraint, a wall you have to write against, and that wall is what builds the skill. If you can write about anything in any way you choose, you'll default to your habits. The exercise becomes repetition of what you already know. Put a constraint on it, remove all adjectives or write using only dialogue or limit yourself to exactly one hundred words, and suddenly you're forced into unfamiliar territory. That's where the learning happens.
What follows are twenty exercises organized by the specific skill they train. They aren't prompts. Each one has a constraint that isolates a particular capacity: observation, rhythm, compression, invention, or imitation. Some of them come from writers who used variations of these methods in their own practice. Some I've adapted from teaching. A few I'm honestly not sure where I first encountered them, which probably means they've been circulating among writers long enough that nobody remembers the source.
The goal isn't to do all twenty in a week. Pick one. Do it honestly. See what it teaches you.
The best exercises for your prose start with your eyes, not your imagination
Most writers think the fundamental skill is invention, making things up. But if you read Eudora Welty's essays on writing, she keeps returning to a different starting point: observation. She argued that a writer's ability to see, really see, the physical world determines the quality of everything else. You can't render a fictional room convincingly if you've never paid close attention to a real one. Joan Didion did something similar. Her notebooks are full of inventories, lists of objects and colors and temperatures, the way a painter might sketch before starting a canvas.
These exercises train observation and sensory specificity. They're deceptively simple.
Sit in one room for fifteen minutes and describe everything you see, hear, smell, and feel against your skin, without using a single metaphor or simile. This forces you into concrete language. Virginia Woolf's sensory passages in Mrs Dalloway work because she stays with the literal sensation before letting it become anything else. When you ban yourself from comparison, you have to find the precise noun, the exact verb. The writing gets harder and better simultaneously.
Pick someone you know well and describe them in a single paragraph using only their gestures and physical habits, never their appearance. Don't mention their hair color or height or the shape of their face. Describe how they hold a coffee cup, or what they do with their hands when they're listening, or how they stand in a doorway when they're about to leave. Welty once wrote that a character's gesture tells you more than a page of psychological description. This exercise proves her right almost every time.
Take a walk you've taken a hundred times and write about it as if you're a visitor seeing the neighborhood for the first time. Goldberg used versions of this in Writing Down the Bones, and it works because familiarity is the enemy of observation. You stop seeing things you pass every day. Forcing the visitor's perspective reopens your attention. Notice what you've been walking past.
Find a paragraph you've written that relies heavily on visual description. Rewrite it replacing every visual detail with a sound. This is a strange one, and it can feel awkward. But it trains you to work in sensory channels you probably neglect. Most writers default to sight. Shifting to sound changes the rhythm of the prose too, because sounds happen in time, and that temporal quality pulls the writing forward in ways that static visual description doesn't.
If these observation exercises start to feel like free writing, they're related. The difference is the constraint. Free writing lets you go anywhere. These force you to stay with the physical world.
Good dialogue is written by ear, and your ear needs separate training
Elmore Leonard famously said he tried to leave out the parts that people skip. What he meant, mostly, was dialogue. His scenes move on talk. But the reason Leonard's dialogue works isn't that it sounds like real speech. Real speech is boring, full of filler and repetition and half-finished thoughts. His dialogue sounds like a distilled version of real speech, and getting to that distillation requires training your ear the way a musician trains theirs, learning to hear rhythm and pacing and the places where silence does more work than words.
George Saunders has written about reading his sentences aloud as a revision method, listening for the places where his mouth stumbles or his attention drifts. Robert Frost called it "the sound of sense," the idea that you should be able to hear the meaning of a sentence even through a closed door, from its rhythm alone, before you catch the individual words. These exercises work on that.
Write a two-page scene between two characters using only dialogue, with no tags, no action beats, no description of any kind. Nothing but the words they say. Raymond Carver's best stories approach this level of spareness, and what you'll find is that without tags and beats to lean on, each line of dialogue has to do more. The reader needs to hear which character is speaking from the voice alone. That's a high bar, and reaching for it teaches you to differentiate voices in ways that "he said, she said" never demands.
Think of a conversation you had in the last week that stuck with you. Reconstruct it from memory, writing it out as dialogue. Don't try to get it verbatim. What you remember is what mattered, and the gaps in your memory will tell you something about what makes dialogue memorable versus forgettable. The lines you can't remember were probably the ones that didn't carry weight. This exercise trains your instinct for which lines to keep and which to cut.
Choose a paragraph of your own prose and read it aloud. Every sentence that makes you stumble or pause awkwardly, rewrite until it reads smoothly on the tongue. Saunders does this obsessively, and he's described it as the closest thing he has to a reliable revision method. The ear catches problems the eye skips. If you can't say it aloud without tripping, your reader will trip too, even silently.
Pick a passage from a writer whose prose rhythm you admire. Read it aloud several times until you can feel the pattern. Then write a paragraph of your own on any subject, trying to match that rhythm. Then write the same paragraph again in your own natural rhythm. You're not trying to copy permanently. You're trying to feel the difference between your default rhythm and other possibilities. Once you've felt a different cadence in your own writing, you can't unfeel it. You start making rhythmic choices where before you were just defaulting.