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.
Plant trees or shrubs to shade air-conditioning units but not to block the airflow. A unit operating in the shade uses as much as 10% less electricity than the same one operating in the sun.