Skip the Harsh Cleaners: You Can Remove Rust with a Potato! The potato trick is so handy (and non-toxic!) and it isn't limited to cast iron — you can use it to remove rust from baking pans, knives, and other household tools. Tips from The Kitchn
Tree Stump Removal - Get rid of tree stumps by drilling holes in the stump and filling them with 100% Epsom salt. Follow with water, and wait. Live stumps may take as long as a month to decay, and start to decompose all by themselves.