Here's some for you; wreaths are simple and effective and so easy to make. I'll bet you have some natural or salvaged materials right in front of you ready to make a wreath out of.
Think outside the box and get creative.
Weedy Wreaths are made from any long and flexible type of plant, weed or not.
Choose whatever your garden supplies in abundance.
I make these with a base of wire, in a circle and the weeds twined around it, or tied in place.
Twig wreaths are the next step up; I've got several favorite twigs that grow close by and always need a trim. You'll see some of the best twigs for crafts here.
Choose from any kind of twig that is long and whippy and won't snap under the pressure for the base - any type of Salix (willow) works well for this, then wrap shorter and more textured twigs like Shepherdia canadensis around that. Experiment!
Looking around the salvage pile or along old fence lines can yield a goldmine of barbed wire; I was lucky enough to find my barbed wire wreath ready made; your experience may vary.
Wanting something even more rustic? How about this rustic garden wreath, using found twigs and leaves from my garden and on my daily walk.
Dried flowers or herbs from the garden make a textured and subtle wreath for a door; use marjoram or golden oregano, different species of thyme and other fragrant herbs and flowers that will emit a delightful summery scent, even in the middle of winter.
And who says wreaths need to be round? Hearts are one of my favorite shapes - this twiggy wreath decorates the shutters of the Mercantile shed.
Here are more, on other sites that have kindly consented to let me put their images on; a beautiful succulent wreath made of no other than panty hose for a spectacular craft;