I love using plain monochrome ornaments and decorations at Christmas. To do with the ornament garland for the fireplace and stairs, here is an ornament door wreath tutorial for making a front door hanging out of ornaments.
Tip: To save money and weight you can trim down a pool noodle and duct tape the ends together to make a wreath form.
Tip: Spray paint your wreath form to match your color scheme. Then you will have to worry less about areas that show through.