It is a good idea to invest in a water saving water faucet. It helps conserve water so you aren't being wasteful. Since you aren't wasting water it will help you save money, because your water bill will not be as high as it was when you were wasting water.

Reduction of error. If your instruments aren't calibrated, you're wasting your time.

They probably don't want a lot of prank callers wasting their time

Do you mean wasting ( ie wasting an opportunity, or wasting food), if so then squandering is a good word.

Wasting My Hate was created in 1996.