If I want to build a really, really huge structure in Minecraft, say, a castle with towers, walls, several floors and over a thousand of squaremeters/tiles per floor, what is the way to go?
How can I effectively accomplish the task without running, climbing etc. around a lot, trying to get up to a wall in order to reach somewhere etc.? Give general ideas and don't focus on my example (the castle) too much. What is a good way to plan such structures before starting to build them?