The zone: "A place were you do focused work without the existence of time."
You have been in 'the zone' when a couple hours have passed without you noticing it. When you're into the zone: you work at maximum efficiency and you produce the highest quality of work. Since you are fully concentrated when into 'the zone'.
But how do you get into 'the zone' quickly? For instance: How to get into 'the zone' in 5 minutes or less?