A few years ago, I picked up a couple metal drums for free on Craigslist. They carried high quality olive oil from Italy to Spago in Beverly Hills. I thought I would turn them into rain barrels. Time went by and they sat behind the garage rusting in silence. These drums deserved more, and one day wandering around Instructables, I came across this design for a rolling drum composter.
Compost Tumbler - More DIY How To Projects
After a few hours of cutting, drilling and screwing, I had a large composter that tucks into a quiet corner of the yard, slowly creating rich soil from our kitchen scraps and yard waste! Sweet!