What techniques does Tolkien use in his writing?

The author JRR Tolkein wrote a great many works, but is most famous for the following:

The Hobbit (1937)

(and the following which is considered the "Lord of the Rings" trilogy:)

The Fellowship of the Ring (1954)

The Two Towers (1954)

The Return of the King (1955)

See the "Related Links" below for a complete bibliography.