Over the last month I had pulled a woman from a blazing inferno. I had called fire and lighting down on assassins and escaped to safety. I had even killed something that could have been either a dragon or a demon, depending on your point of view. But there in that room was the first time I actually felt like any sort of hero. If you are looking for a reason for the man I would eventually become, if you are looking for a beginning, look there.
Patrick RothfussThe thing that helps me do a good job is that I don't feel the need to explain everything about the world to my reader. I'm not writing a history text on the Four Corners. I'm telling a story that's set there. The setting belongs in the background for the most part, and it's easy for fantasy authors to forget that. That's one of the unfortunate parts of Tolkien's legacy, in my opinion. Read the first hundred pages of the Fellowship of the Ring and you start to get pissed, "Shut up about the Shire's museums! Isn't the world supposed to be in peril or something?"
Patrick RothfussThe 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 Rothfuss