If you have extra ornaments after filling up the tree and all of the usual spaces, find creative ways to use them or places to hang them. From a chandelier is a perfect spot to showcase some of the leftover decorations. You can also hang a few from your curtain rods for an unexpected holiday look.
A hutch, buffet or sideboard is also a good place to sprinkle a few ornaments or other decorations. Small holiday baubles spilling out of teacups or gravy boats will give your dining area a holiday feel.
If you have extra pine garland (or better yet, find some fresh in your yard), drape it around a mirror or a favorite picture to "holiday" it up.
A little creativity and you can use what you already have to make your house a lovely holiday wonderland.