The following is an excerpt from my book How To Write A Novel: The Fundamentals of Fiction, Chapter 3:

In Writing the Breakout Novel, Donald Maass identifies five basic plot elements that all plots must have. They are:

A sympathetic character
Conflict
Complication
Climax
Resolution

So, every good plot starts with character, specifically a character we can care about. Then that character encounters obstacles that create conflict. This can be another person or group of people, some natural or other issue, etc. Then the conflict is complicated by various other obstacles and barriers that stand in the way of the character resolving it. This leads to a climax wherein the character must confront the opponent—person, animal, or thing—head on and see who will win. This leads to a resolution. These five elements make up any solid, well-developed plot.
We’ve already talked about how the plot is a series of questions asked and answered, so now let’s look at a key question we must always ask to make our plots stronger: What’s the worst that can happen?

You start with conflict and then consider what the complications might be. In doing so, there may be a temptation to like the character too much and not want to make things too hard on him or her. But that is the death of good drama. Instead, you need to ask yourself, “What’s the worst that can happen?” and consider the more dire possibilities. This is what makes good drama. Maass writes: “What makes a breakout novel memorable are conflicts that are deep, credible, complex, and universal enough so a great number of readers can relate.” So, don’t go off the deepest end necessarily, choosing something so dire and outrageous that it seems too hard to believe. You want to complicate and create disasters and dangers, not create incredulity in readers.

What you do want to do is push your problem far beyond what readers might imagine. Maass suggests: “Push your characters into situations that you yourself would never go near in your own life.” Remember that the characters should speak and act in ways we only wish we had the courage to do. This is what inspires us to admire and follow them. So they will be capable of facing situations we wouldn’t dare take on ourselves. The key is to push things to utter extremes while still managing to make them feel familiar to readers. Not outlandish, then, but familiar. In other words, possible.

When we create conflict that is credible, relatable, and familiar, we create stories with tension on every page. These are the kinds of stories that keep readers turning pages and coming back time and again to the same authors for more. John Grisham, Nicholas Sparks, Michael Connelly, Jonathan Maberry, Stephen King, Joyce Carol Oates, Heather Graham, J.K. Rowling, Rachel Caine—these are examples of authors who have mastered this technique. If you want your plots to become breakout, hit stories, you must create tension on every page. Make us desperate to know what happens next. Create urgency in the questions the plot asks. This will drive the story forward, increasing the stakes and tension with each scene and page, until readers may feel they or the characters can’t possibly take anymore, but they do every time. And we are dying to know how they manage it and can possibly survive, so we stay up all night reading to find out. We’ve all read and loved books like that, right? Imagine what it would be like to write one.

One technique that aids this kind of tension is nonlinear narrative. Grisham is a master of this: constantly holding information back from his readers to surprise them with later. Nonlinear narrative is storytelling that increases tension by telling the story in a nonchronological fashion, using flashbacks and other such techniques. Basically, you start telling the story in the center of the action at the most dramatic place and then go back and fill in the backstory and details as necessary through the course of the novel.

For what it’s worth…