Pick a theme that is meaningful to you. I've done them for horselovers, teachers, tennis players, etc. and incorporated things into the theme and onto and around the house. For a train lover I managed to put a dollar store children's train set around the house (the plastic track went around the house and the wind-up train went around on the track).
Also, get something nice to use as your base---a pretty Christmas plate or a sturdy piece of cardboard wrapped in festive Christmas paper.
Tootsie rolls (the midgies) are great for chimneys, log piles and fencing (stand it up and use licorace or royal icing in streams between the tootsie roll fence posts).
Colored sugar crystals look nice sprinkled over the whole thing.