TUTORIAL: How to write in Elvish. This is the most detailed and thorough I've seen. Also, check out a lovely book called "The Languages of Tolkien's Middle Earth". It explains elvish (Sindarian and Quenya), Dwarvish, and others. Written by Ruth S.
Gondor, The White City. All know is that I could never draw that, let alone paint it. John Howe and Alan Lee, the gentlemen who did the conceptual art and much of the design throughout the making of the Lord of the Rings trilogy, incredible artists.