DIY Rag Trees - these are made out of dowels to desired length, and torn home spun fabric in Christmas colors, a rusty tin star, raffia, and a piece of branch that has been cut on a band saw and drilled in the middle to accommodate dowel.
Footprint Reindeer- great idea for Christmas gifts or cards. A fun activity to do with the kids and then give for Christmas. I have never met a family member that didn't like something with the child's hand/foot prints.
DIY modern perforated christmas trees: uses simple paper mache cones found at the craft store, drill a few holes (sand them a bit as needed) and spray paint white. Set a LED tealight (battery operated) under the cone for the lit up effect!