How about no Xmas tree? I'm not a big on holidays, unfortunately Xmas has been more of a 'marketing holiday' then ever.
One other thing we started several years ago, was a small "memorial tree". This has only lights and few decorations. The decorations are actually silver-plated picture frames with pictures of loved ones we have lost over the years. It is a great way for us to honor them and has been great for the kids to know some of the relatives they never met or would not remember too well. We are sad when we have to add a new picture to the tree, but are happy to have a unique way to remember them at Christmas.
Although I did notice while putting it up, that the feeling of pine needles on the bald done is horrible