Among the points you should avoid when preparing whitepapers are:
Craft a thinly veiled sales pitch. You have to take into account the chinese overseas europe database constant bombardment users are subjected to: if they sense it's just another form of advertising, they might dismiss the white paper immediately.
Present yourself to the user as a divine being capable of understanding and solving all their problems. Selling magic solutions isn't effective if they don't know you yet.
Focus on selling and not on generating empathy with the buyer.
Characteristics of Whitepapers
They are linear and focused on a single theme.
They include data based on research.
They are presented in a formal tone and are usually more specific than e-books.