Fill column vases with ornaments or silver and gold sprayed small natural items (nuts, little pinecones). Dollar Tree has these vases for only one dollar, although they're a small version, but could be grouped by the half dozen and raised to different levels with stacks of coasters or something underneath.
I like the overall look, but feel like the room needs a little bit of color to break up all of the off-white. The tree next to the fireplace reminds me of my Aunt Carolyn's house. Something like this would look good in her living room.