The key to good worldbuilding is leaving out most of what you create. You, as the author, had damn well better know the where all that dragon food comes from, but that doesn't mean that I, as a reader, want to read a five thousand word essay about you explaining it to me. I don't need to see the math, but I can tell by the details you provide whether or not you've thought these things through to their logical conclusions.
Patrick RothfussJoss [Whedon] is an excellent storyteller. It really doesn't matter what medium he's working in.
Patrick RothfussI believe a writer's most important skill lies in being able to see things from different perspectives.
Patrick RothfussIn brief, worldbuilding is different than setting in my opinion. Setting is a room. A backdrop. It's scenery. But without good worldbuilding, you can't have realistic feeling scenery. You can't have cool, unique backdrops for your story.
Patrick Rothfuss