Out of the 2 years I've played Minecraft, I've never had a big project. I'm starting a big project!
Every tile on the overworld is equal to 3 block in Minecraft. This is mainly because it takes me 3 tiles to make a tree. In caves and dungeons, 1 tile equals 1 block cause I don't need trees. This may change to 2 if the dungeon rooms wind up looking too small.
The construction of the first area:
I'm going to do the entire overworld, every cave and all the dungeons. This may take a while.