You can find unique Christmas decorations and ornaments at http://www.squidoo.com/christmas-tree-themes. There are also gothic Christmas trees and decorations. Try http://www.squidoo.com/GothicChristmas
Unique and unusual Christmas decorations can be a lot of fun. You can find some examples at http://www.toxel.com/inspiration/2010/12/25/unusual-christmas-decorations/, and http://www.squidoo.com/christmas-tree-themes.
Personal family decorations can offer a unique theme to your Christmas decorations. Personalized stockings to hang by a fireplace would be a great example of this.
You can find origami Chrisrmas decorations. You can find origami Christmas decorations at www.origami-resource-center.com/christmas-ornaments.html. These Christmas decorations are not too hard to make.
There are many great places that offer Christmas decorations after the holiday season. Some of the stores that you might check with for Christmas supplies are; supermarkets, craft stores, and supply stores.
My favorite place to find modern Christmas decorations is Target. Their decorations suit the modern style. You can also find decorations from Martha Stewart at Kmart.
You can find a good deal of outside Christmas decorations. You can find outside Christmas decorations for a good price at www.amzon.com, www.overstock.com, Walmart, and Target.
Yes, The Home Depot has a variety of Christmas decorations. Among these, are decorations for trees. They also offer unique decorations that other stores don't carry.
There are many places where someone can find information about Christmas light decorations. Websites such as, Christmas Central, and Home Depot both have information about Christmas light decorations.
If you're looking for silver Christmas ornaments that are unique, I would suggest checking at Bonner's. Bonners is located in Frankenmuth, Michigan and offers the best Christmas selection in decor that you'll find anywhere.
I don't see any sites that sell Lego Christmas decorations. However, the following web site has instructions to make your own: http://www.nclug.us/2007/12/02/lego-christmas-ornaments/.
The most unique Christmas tree decorations are those that you make yourself. I'd recommend stringing popcorn and making your own ornaments from outdoorsy items like pinecones. You can spritz these up really nicely with a little ribbon and glitter.