How To Clean a Ceiling Fan with a Pillowcase - So useful! Slide a pillow case over each blade and wipe them clean. The dust goes in the pillow case and can be repeated until all blades are clean. When you're done, take it outside and shake it to set those dust bunnies free once more!
Not that I have a dishwasher, but: Lemonade Kool-Aid as Dishwasher Cleaner
Clean lime deposits and iron stains inside the dishwasher by pouring a packet of lemonade Kool-Aid (the only flavor that works) into the detergent cup and running the (empty) dishwasher. The citric acid in the mix wipes out stains; you don't have to.
Onion as Basement Deodorizer - Clear the air in a dank basement. Cut an onion in half, place it on a plate, and leave it out overnight. Once the initial salad-bar aroma dissipates, you'll have a fresh (non-oniony) atmosphere.
Polish faucets, sinks, tile, even shower doors with Turtle Wax, which leaves behind a protective barrier against water and soap buildup, so your hard-earned sparkle will last past the next tooth-brushing.