I demonstrate how I make a wreath using Xmas tree clippings and eucalyptus, and adding a string of storebought battery-powered LED lights. You can add other clippings and decor of your own, and you can probably make your own wreath ring as a base, but this is how I learned to do it on the day after Thanksgiving 2007 at Costanoa, a camp north of Santa Cruz, California.
Projects from Make: Magazine
Wreath for Solstice / Yule / Christmas
Build a wreath on a wire ring using discarded twigs from a tree lot. Add lights, ribbon, and other decor of your choosing.