Liquid laundry detergent

When your liquid laundry detergent bottle is empty, do you toss it? Don't. Use a butter knife or screwdriver to take out the nondrip spout and you'll sometimes find enough detergent to do another load. When you use that, pour a little water in the emptier contaner, swish it around and dump it in a bucket or bowl to use for mopping floors or other cleaning.

Baked potato skins

The next time you peel potatoes, wash them first and trim off any bad spots or eyes. Drop the peelings in a bowl of cold water until you're ready, then drain, toss them with oil, lightly salt them and arrange them in a single layer on a baking sheet. Bake at 400 until crisp and browned. They keep very well without refrigeration, but make such a good snack you probably won't have to worry about keeping them very long!

"Free" cooking oil

If you buy tuna or fish steaks in oil, drain it into a container and use it in stir fry or to fry potatoes or saute other foods. No sense in wasting it; it's good oil for cooking although it might have a slightly fishy taste, so be judicious where you use it.

Use it all

Always use all of everything. Turn bottles upside down and drain to get the last bit from them. Tear open sugar and flour sacks to get it all; squeeze or cut open tubes of anything to use it all before buying more. You bought it to use, not throw away.