Game development communication technique #31: 'The Gardener'
"The Gardener plants the seed of an idea early and then brings it up again many times...eventually, the idea starts to take root and grows on people until it becomes an actual feature in the game and no one can remember where the idea came from."
- Epic Games' Cliff Bleszinski on the "The Gardener," one of thirty-five game development communication techniques outlined in Cliff Bleszinski's Game Developer Flashcards
As Bleszinski points out himself, this is a very useful technique, even beyond game development. I've employed it a few times for changes to Gamasutra, but don't tell the other editors.