An easy way to make sure your garden tools are clean and rust-free is to use a bucket filled with a sand-oil mixture. Fill up a 5-gal. bucket with clean, dry sand, then lightly saturate it with new motor oil. When you are done using tools like shovels, forks and spades, scrape off excess soil and plunge them up and down in the mix. Small tools like trowels can also be cleaned the same way. Wipe the tools dry before storing.