Cast iron pans
First things first: Never, ever put your cast iron pan in the dishwasher or let it soak! Wash it with soap one time (when you first get it), then just use warm water after every use and be sure to dry it completely before putting it away.
OK, those sweaty gym leggings and underwear should obviously be tossed right in the laundry bin. But those jeans you wore one day for two hours? Keep them out to wear again (and even again). Washing and drying your laundry too often makes them wear and fade much faster. Speaking of laundry, here’s the secret technique for how to keep your towels extra soft and fluffy.