LotR Poems:
All of the following poems are found in the Lord of the Rings novels.  They are a great source of inspiration, and just all around masterpieces of work. 

Elbereth Gilthoniel
Fair Lady Goldberry
Galadriel's Song of Eldamar
Sam's Song in the Orc-Tower.
Song of Beren and Luthien
Song of Eärendil
Song of the Elves Beyond the Sea
A Walking Song