Tolkien's letters are rich with information about J.R.R. Tolkien's writing process. I wrote a post last week about Aragorn being Tolkien's example of an epic hero, and someone posted: "But Frodo Baggins is the hero of the LOTR trilogy, right?" I would argue that he is not, but only one of three or four characters who together make a great hero for the epic story.
Some tips worth remembering (and having reiterated)!