Addendum

But what if that isn't enough? Have a villain or rival guess at the plan, but guess wrong, and have him to repeat it to all of his associates until it gets to someone who knows the plan and says, "No, what will actually happen is . . ."

How to Write a Book Quickly

Start by having the main character come up with an intricate plan, then every time a new character is introduced, describe the plan again in full. You'll be done in no time.