These all look pretty simple to make. I found them at Readers Digest and Better homes and Gardens online.
Another idea I had is to take any wreath you have lying around, lay it flat on the center of your table and put a vase, jar, or hurricane in the middle, and fill with anything you think looks festive.
Ex. glass bulbs, flowers, a chunky candle, water or colored water with a tea light floating, water with floating flowers
Use your imagination the possibilities are endless!