Wreaths are a part of many holidays. Besides buying them, in many cases it is easy and less expensive to make your own. Also by making your own, you can make it the way you want and it can be different than any you may find in the stores.
By searching online you can find a ton of ideas for any holiday or event. I have started Pinterest board with some ideas.
The start of any wreath is the form. You can buy forms at most craft stores but you can also make your own. You can use foam tubing from the hardware store or cut a pool noodle to the right length and tape with duct tape. You could also use a picture frame and glue items to it.
Last year I made wreath from coffee filters. The brown ones can be decorated with leaves and garland for fall. The white ones could be decorated for Christmas, Easter and more.
Another idea is Celebration wreaths. They are made with balloons to put on your door on family birthdays and other celebrations. They also could be made with all of one color of balloons, such as black for certain birthdays, or certain colors for showers and other parties.