I've always thought wreaths make such a great DIY project. First, they are fairly easy and generally inexpensive to do. You generally need a new one for every season, or even for specific holidays, which means you need a handful in stock for every occasion. Since it doesn't stay on the door for more than a few months it is totally fine to use the same wreath each year, so you get good use out of the wreath and don't get bored by the style.