Professionals would recommend you to use the good old trick: a tray that will gather all the decor items. Pick a nice one that looks decorative. After you pick the perfect one, carefully choose the items that you will display. Go for something interesting and eye-catchy.
Choose items that have different heights. It looks way more better. If you use only low profile items, your decor will look too flat.
Do not forget to add a few candles. They will add a romantic note to your decor.
Yes, Christmas tree ornaments are not only for the tree. You can use them to decorate the table too. Pick a pretty bowl or tray and place a bunch of them.