Pallets are accessible anywhere and everywhere for free. I would recommend using pallets to make your own house, compost bin, raised beds, or decor in your home. My partner found these pallets behind a country store; but you can find them behind any grocery store, big business and organization buildings (i.e. college campuses.) Pallets are all around us, it just takes some energy to go find them.
Considering these were readily accessible and free, my partner is making all of our raised beds out of pallets. For example, in the two pictures below, he has already built one wall on our first raised bed.
Here is the finished product of our first raised bed:
If you're interested in using recycled pallets for constructing your own raised beds or other projects, check out this video for some inspiration and to further your knowledge on how to use recyclable materials to make everything yourself (by kirstendirksen on youtube):
I mentioned that you can use pallets as decor in your home, check out this website's examples of using pallets at New Life On a Homestead: creative uses for free wooden pallets.
Below is another video to inspire you to use pallets, from growingyourgreens.com: