What's wrong with LARPing?
I have a moonstone ring that I think has a very elvish feel like that; it was my great aunt's. I'll have to find my picture of it.
But actually, I tend to gravitate towards furniture that gives me this Middle-earth sort of feel - mostly leafy sorts of things. I recently bought a lamp at K-mart of all places that is like a leafy stem. I also was using a table actually meant for outdoors...patio/garden furniture, but hey... as a bed-side table. It's green with long leaves and gold coils that are placed kind of like flowers. Then I bought a dresser that had to go on that side of my bed, and the little leafy table is sitting pratically in my doorway.
I still don't know why I buy these things.
And though 'leafy' doesn't necessarily have anything to do with Middle-earth, it's that feel of the importance of nature (not that I don't feel that in "this"/the "real" world, too) and how elves just like trees, I suppose.
I also found this nice paint stencil that I used to decorate my bed frame and a chest. That reminds me a bit more of the Eowyn's jewelry in the movies, though, rather than elves.