Michaels usually has a fantastic ad for Black Friday. If you want to score an inexpensive Christmas tree and all of the ornaments it will hold, this is a great time for getting that done. You'll probably find 50-percent off Christmas items sales in November, and shopping then will give you the best selection. If you want to go even cheaper, wait until after Christmas, and especially until January, to score 70-percent or more off of your Christmas-themed items.