The best way to avoid a mess when removing your tree is to place a plastic tree bag (which are available at hardware stores) underneath the stand when you set the tree up. You can hide it with a tree skirt. Then, when the holidays are over, pull the bag up around the tree and carry it outside. It is inevitable that some needles will stil scatter inside. For those, it is better to sweep them up; as needles can clog vacuum cleaners.