So You Want To Write A Novel? Here's how to do it in three E-Z steps! Yes, it's

The Canonical, Stereotypical, Not Necessarily Applicable, Do-It-Yourself Novel Writing Kit

as derived from the comments of various authors including Lester Dent, John Gallishaw, Jack Bickham, Tom Holt and Terry Pratchett

Step One: The Idea

Formulate a thought as to what the story might be about and write it down.

"Exploding chaos."

Having done this you can unpack the idea...

"What kind of explosion? Literal? Figurative?"

"What kind of chaos? Political? The kind that Mandelbrot?"

...and then discover what recursion means by unpacking those unpacked elements...

"A literal explosion. Of what? A volcano? A t-shirt factory in Togo?"

"Mandelbrotten chaos. Mathematical? Environmental?"

...and so on, until you get a feeling as to whether there's enough to the idea such that you can get 50,000 words out of it. If not, throw what you've got so far into the parts bin for later; no point in wasting all that thought.

You could use a theme ("Love Conquers All", that sort of thing) to unpack the idea; if the idea was a theme you could throw in another ("Death Before Dishonor") and use that.

"What's love got to do with explosions and chaos?"

"Aha, Dr. X was trying to impress Ms. Y and decided to blow up the Earth by dropping a live chaotic attractor down Mt. Etna..."

Assuming you've gotten this far, with the specifics obtained you can decide on what type of characters might be involved — obvious classifications being Hero, Romantic Interest, and Villain; you'll want something more specific. It won't hurt to have a large cast since you can always remove them again.

"A member of the Bomb Squad? A mathematician?""Have these people got friends? enemies? relatives?"

Philip K Dick suggested that one character is going to benefit from the idea and one is going to be harmed by it; hero or villain is up to you.

With characters involved you can get some ideas as to what sort of fates they merit...and at this point you can move on to —

Step Two: The Cartoon

There's a big difference between the essayist's outline — I - II - III / A - B - C — and the artist's outline, which is what I mean by cartoon. You're a novelist; you almost certainly want the latter. This method simply requires that you (arbitrarily) create pieces of the story at key places throughout its structure: e.g. a few sentences of the beginning, a paragraph's worth of the middle, a few more sentences of the end.

"Doctor X looked at his high school yearbook. How could he not have noticed Ms. Y in the Physics Club?"

...

"'No!' cried Melvin Frobnush as Seattle was washed away by lava, much to his dismay.

...

"'I now pronounce us man and wife,' said Doctor X, just as Ms. Y proceeded to ravish him with kisses."

Having done this you can create additional sections by interpolation, which in turn can be used to create even more — all of them presumably requiring earlier or later developments, additional characters, incidental objects that need acquiring, and so on. (This is where story and character arcs come in, since an arc is essentially two endpoints, a lot of interpolation, and a point of maximum deviation. Beginning, End, Middle.)

At some point you'll either give up in disgust or think "This'll do". If you can think of what the back cover blurb will say, you're probably ready to move along to —

Step Three: The Writing Of Scenes

Apparently it's time to turn the cartoon into a portrait by filling it out, section by section. In Approximately Five Steps a section "should" (ha!) run as follows:

1. Set The Scene.

Who, what, where, when — choose one or more.

2. Establish The Goal.

Typically, show a character's wish to maintain or change the status quo (the character is threatened or declares a desire).

3. Show The Action Toward The Goal.

A structure could be:

1. the character encounters opposition, leading to conflict, displaying background details about himself in the process. Optionally throw in a prop — the contents of his pockets, a discarded umbrella, light saber, encyclopedia, etc.
2. The action fails; the conflict ends in defeat.
3. The character has an emotional reaction to the defeat. The premise intensifies: the threat returns with a vengeance, or the desire becomes more urgent. Add specifics, and involve other characters, if possible.
4. The character realizes that he must make a conscious change in his character to solve the problem: the selfish must perform an altruistic act, the claustrophobe must go into a cave or sewer, the coward must confront a bully. He makes a character-expanding decision and formulates a plan.

4. Demonstrate The Success Or Failure Of The Action.

Given the structure above, the character would take the beyond-present-character decision (optionally combining it with the prop from 3a) and act toward resolution.

5. Hook The Plot.

Show the effects on the character — towards the beginning, this typically means Things Get Worse — and lead into the next scene.

Canonically-Stereotypically, a scene "should" (ha!) run about 800 words (note that this is 3.2 standard manuscript pages, thereby avoiding Intimidating Blank Page Syndrome when it comes time to start the next scene), which means you'll need 63 of them for your Canonical Stereotypical Novel.

A.E. Van Vogt favored putting an unexpected plot twist in every scene; some people took this to mean putting in a Brand New Unusual Idea in every scene, which is a nice touch if you can manage it. If not, most likely no one will notice.

That's about it. Good luck...and don't forget to ignore everything you've just read if it suits you.