The easiest idea is to hang a wreath. Here's a link with more ideas:
Here is a unique wreath I made this year with step by step directions: http://celebrateanddecorate.com/how-to-make-a-snowflake-wreath/
I just added plain garland wound the door.
I you want something more elaborate, you can do this: http://celebrateanddecorate.com/a-sweet-christmas-home-tour/
What about a fabulous DIY Christmas wreath? https://www.frugalfamilytimes.com/2019/11/dollar-store-christmas-wreath-ideas.html
Donna....Hanging a wreath on door using nail, command strip, hanger or ribbon works for me but I have also done garland around the door.
Cover it with wrapping paper and tie a big bow around it to look like a present
I love adding a wreath, I do it for all occasions so I have one on my front door year round.
Hi Donna - This is how we decorate our home for Christmas, plus a tutorial on some delicious holiday diffuser scents. Hope it helps with some inspiration and Merry Christmas! Hugs, Holly
PS - We have a FREE Advent calendar printable to countdown to the season! You can download it here --> https://pinkfortitude.com/thank/#Advent
here are some wreath ideas: