Hanging lights on branches. Go natural with a fat branch and hang a combination of ornaments and candles attached with wire. Use twine or strong fishing wire to suspend the branch from above. You might want to try hangers so as not to damage your ceiling.
this reclaimed tree root coat rack is a wonderful way to bring the woods into your house. Standing unadorned, it makes a gorgeous piece of sculpture, so be warned, you may have trouble throwing your coat and hat onto it!