Leo Babauta’s brilliant little book Zen Habits helps you think your way through this problem. His program is simple: Attempt to create only one significant work a year.

"Don’t dash off a six-thousand-word story before breakfast. Don’t write too much. Concentrate your sweat on one story, rather than dissipate it over a dozen. Don’t loaf and invite inspiration; light out after it with a club, and if you don’t get it you will none the less get something that looks remarkably like it. Set yourself a “stint,” [London wrote 1,000 words nearly every day of his adult life] and see that you do that “stint” each day; you will have more words to your credit at the end of the year.

Study the tricks of the writers who have arrived. They have mastered the tools with which you are cutting your fingers. They are doing things, and their work bears the internal evidence of how it is done. Don’t wait for some good Samaritan to tell you, but dig it out for yourself.

See that your pores are open and your digestion is good. That is, I am confident, the most important rule of all.

Keep a notebook. Travel with it, eat with it, sleep with it. Slap into it every stray thought that flutters up into your brain. Cheap paper is less perishable than gray matter, and lead pencil markings endure longer than memory.

And work. Spell it in capital letters. WORK. WORK all the time. Find out about this earth, this universe; this force and matter, and the spirit that glimmers up through force and matter from the maggot to Godhead. And by all this I mean WORK for a philosophy of life. It does not hurt how wrong your philosophy of life may be, so long as you have one and have it well.

The three great things are: GOOD HEALTH; WORK; and a PHILOSOPHY OF LIFE. I may add, nay, must add, a fourth — SINCERITY. Without this, the other three are without avail; with it you may cleave to greatness and sit among the giants."

[Getting Into Print (The Editor magazine, March 1903)]

Go for broke. Always try and do too much. Dispense with safety nets. Take a deep breath before you begin talking. Aim for the stars. Keep grinning. Be bloody-minded. Argue with the world. And never forget that writing is as close as we get to keeping a hold on the thousand and one things — childhood, certainties, cities, doubts, dreams, instants, phrases, parents, loves — that go on slipping , like sand, through our fingers.

The best writing advice I've ever received:

1. Stop when you have something left to say.
2. Write a 100-word note to yourself where you left off.
3. Pick up with low friction and immediate momentum.

This could be applied to more than writing.

Not so much to do a big brainstorm, but to tap what you've been working on
unconsciously overnight. Which of course, is a principle that Hemingway wrote
about when he spoke about the two core principles in his creative writing
process, number one ending the workday with something left to write and — So not doing everything he had to do. Which most people do, but they
feel this sense of guilt if they're not working. You and I have discussed this at
length, but leaving something left to write and then the second principle, release
your mind from it. Don't think about it all night. Really let go. Have a glass of
wine. Then wake up first thing in the morning and reapply your mind to it.

First rule of writing is to read everything you can get your hands on to fill your head with ideas. And then, once you have your story down, let it rest. Then revise, revise, revise.

One of the few things I know about writing is this: Spend it all, shoot it, play it, lose it, all, right away, every time. Do not hoard what seems good for a later place in the book, or for another book, give it, give it all, give it now.

One of the few things I know about writing is this:spend it all, shoot it, play it, lose it, right away, every time. Do not hoard what seems good for a later place in the book, or for another book; give it, give it all, give it now. The impulse to save something good for a better place later is a signal to spend it now. Something more will arise later, something better. These things fill from behind, from beneath, like well water.

"Abandon the idea that you are ever going to finish. Lose track of the 400 pages and write just one page for each day, it helps. Then when it gets finished you are always surprised." - John Steinbeck from the Fall 1975 issue of The Paris Review

(What is your advice to writers, especially young writers who are just starting out?) NSN: Number one: Read, Read, and then Read some more. Always Read. Find the voices that speak most to YOU. This is your pleasure and blessing, as well as responsibility! It is crucial to make one’s own writing circle – friends, either close or far, with whom you trade work and discuss it – as a kind of support system, place-of-conversation and energy. Find those people, even a few, with whom you can share and discuss your works – then do it. Keep the papers flowing among you. Work does not get into the world by itself. We must help it. Share the names of books that have nourished you. I love Writing Toward Home by Georgia Heard, for example. William Stafford’s three books of essays on the subject of writing – Crossing Unmarked Snow is the most recent – all from the Poets on Poetry series of the University of Michigan Press, Ann Arbor – are invaluable. I love so many of these new anthologies that keep popping up. Let that circle be sustenance. There is so much goodness happening in the world of writing today. And there is plenty of ROOM and appetite for new writers. I think there always was. Don’t let anybody tell you otherwise. Attend all the readings you can, and get involved in giving some, if you like to do that. Be part of your own writing community. Often the first step in doing this is simply to let yourself become identified as One Who Cares About Writing! My motto early on was “Rest and be kind, you don’t have to prove anything” – Jack Kerouac’s advice about writing – I still think it’s true. But working always felt like resting to me.

One of the vital things for a writer who’s writing a book, which is a lengthy project and is going to take about a year, is how to keep the momentum going. It is the same with a young person writing an essay. They have got to write four or five or six pages. But when you are writing it for a year, you go away and you have to come back. I never come back to a blank page; I always finish about halfway through. To be confronted with a blank page is not very nice. But Hemingway, a great American writer, taught me the finest trick when you are doing a long book, which is, he simply said in his own words, “When you are going good, stop writing.” And that means that if everything’s going well and you know exactly where the end of the chapter’s going to go and you know just what the people are going to do, you don’t go on writing and writing until you come to the end of it, because when you do, then you say, well, where am I going to go next? And you get up and you walk away and you don’t want to come back because you don’t know where you want to go. But if you stop when you are going good, as Hemingway said…then you know what you are going to say next. You make yourself stop, put your pencil down and everything, and you walk away. And you can’t wait to get back because you know what you want to say next and that’s lovely and you have to try and do that. Every time, every day all the way through the year. If you stop when you are stuck, then you are in trouble!

I would, first, advise them to start writing about what they know best (i.e. themselves, their immediate environments, feelings, etc.). Writers should also hone their craft by constant practice, producing many drafts, as haste is a detriment to a writer’s success. My last piece of advice is that, when they achieve success, they should not become arrogant; arrogance can incapacitate writers. Voltaire rightfully says that “the writer dies suffocating under bouquets of flowers.”

The most solid advice for a writer is this, I think: Try to learn to breathe deeply, really to taste food when you eat, and when you sleep really to sleep. Try as much as possible to be wholly alive with all your might, and when you laugh, laugh like hell. And when you get angry, get good and angry. Try to be alive. You will be dead soon enough.

This is what I believe to be the progress of a writer. You write 10 things, of which one of them will be great. You then write 11 things, of which two of them will be great. Then you write 12 things, of which four of them will be great. Then you write 13 things, of which eight of them will be great. Finally you write 14 things, of which 16 of those 14 things will be great.