To decorate your bedroom for Christmas, start by adding some festive greenery and lights. A small Christmas tree or a garland of pine branches can be placed on a bedside table or dresser, adding a touch of Christmas cheer to the room. You can also hang a wreath on the door or put up some string lights around the room. Adding some Christmas ornaments, snowflakes, or other decorations around the room can also create a festive atmosphere. For a more cozy feel, try adding some Christmas pillows or blankets to the bed.