I've built lots of different composting systems over the years, but this is one system that I keep coming back to. Why? It's simple, easy and quick and you can get a compost pile going in a few minutes.
It's got one supply that you may have to buy or scrounge - a 9' (approximately) length of stucco wire, chicken wire or page fencing. That's it. Told you it was simple!
The ends are wired together, or an even simpler method (and one that doesn't hurt your hands) thread a stick through the square holes to 'sew' them together.
I set these diy compost bins up where I need them, and move them to turn the compost if necessary, or leave them until the composting ingredients have magically turned into black gold, ready to use on the garden.
Use them right in place in the garden bed in the summer to put crop debris in, and dig it in when spring arrives. Some crops love to grow right in this kind of compost bin - especially members of the squash family.
There are always a couple of lengths of fencing parked around the garden, ready to be set up on their side and curled around, where I can start adding some fall leaves, garden debris, old hay, and don't forget to sprinkle in a bit of mature compost or garden soil which will contain that essential ingredient; the microherd.
If the compost seems to be a bit slow, I'll rummage around under tubs and planters for a few redworms and add those too. A handful of dolomite lime or wood ashes now and again changes the pH to make it more to the worms liking.
If it's really dry and hot, I'll water the pile, and then put a plastic bag (salvaged from the application of steer manure or chicken manure) and that stops too much moisture from escaping by evaporation.
Same goes if it's really rainy for a long period of time. Cover the pile and prevent the nutrients from washing away.
As a bonus, this easy system also prevents animals from getting into the pile before the ingredients have a chance to rot down; cover it with a piece of lumber or a square of the same fencing to stop them climbing in (especially important to stop dogs from eating the partially rotted compost, and critters like skunks)