A hint - Dan Brown's Seven Points for Writers

In 2005 Lisa Rogak published The Man Behind The Da Vinci Code – An Unauthorized Biography of Dan Brown. 

She describes the outline for Seven Powerful Tips used by Dan Brown on his website (but since scrubbed from that site). 

She writes that the outline provides a revealing look at how Brown "plans and crafts the flow of his own novels."

Here, briefly, are his Seven Powerful Tips:

Setting – reveal new worlds to your readers.

In and out scene building – keep things moving.

A sole dramatic question – use a single brick for your foundation.

Tension – create it with the clock (fast passage of time to speed the novel); the crucible (apply your heat to your constrained characters); and the contract (make promises to your reader and keep them).

Research – learn the specifics you will need for your novel.

Weaving of information - dole it out in small bites.

Revision – go back and play with your first draft.

If you would like to read about Dan Brown hanging upside down in gravity boots while writing, click here.