Woodrow Wilson was once asked how long it would take him to prepare for a 10 minute speech. He replied “Two weeks”. He was then asked how long it would take for a 1 hour speech. “One week”, he replied. 2 hour speech? “I’m ready right now,” he replied. (It’s easy to fill in time with “fat”. It’s much more difficult and takes more advance preparation to succinctly trim the fat and deliver the “lean”.)