Dry out that soap

If the shelves in your shower stay too wet and make the soap 'melt', put it in a net produce bag and hang it over the shower head or faucet. It will dry out between showers and last longer.  

How to use those soap slivers

Put those small soap slivers in a bath mitt or simply put them in the center of a washcloth and bring two opposite corners together and tie; do the same with the other two corners. When you're through, untie the washcloth and put the soap bits back for the next time.

Clean teeth

Run out of toothpaste? Use baking soda, baking soda and hydrogen peroxide, baking soda and salt, or plain hand soap - it doesn't taste as bad as you think, and it will clean your teeth.

Saving soap

Every time you put a bar of wet soap on a dish that drains away the water, you drain away soap, too. Put it in a dish with a solid bottom and when the bar is finished, use the "sludge" in the bottom of the soap dish. It's soap and you paid for it.