As delivered by our good friends at Old Republic Home Warranty:
Instead of using chemical drain cleaners to clear a tub or sink stoppage, pour 1 cup of baking soda and 1 cup of salt down the drain, and then follow with 1 cup of white vinegar. Let it sit 15 – 20 minutes, then follow with a pot of boiling water.
To keep your garbage disposal running smoothly and odor free, try this: Fill an ice cube tray with a mixture of 1/2 vinegar and 1/2 water. Once the cubes are frozen, place 2 – 3 cubes down the disposal a week for about a month. This will not only sharpen the blades, but also keep your disposal clean and odor-free at the same time! (Grinding lemon peels in your disposer will also work well for odors).