Whenever I go to the store to buy produce, that needs to be washed, I try to do a bunch of the washing all at once. But you can waste a lot of water down the drain when you’re cleaning veggies, so I always get a big stock pot and set it under the faucet and I put a strainer over the stock pot, so when I’m rinsing my veggies, I’m also collecting the water, which I then use to water my outdoor potted plants (instead of using more water from the hose).
Same thing with boiling potatoes, or pasta. When I drain the hot water, instead of just dumping it down the sink, I drain it into the big stock pot, let it cool and then pour it on the plants.
If I’m rinsing out a pot or other item that is either too big or not able to go into the dishwasher (such as my non stick frying pans). I’ll put a tiny bit of boiling water (that I’ve heated in the kettle or in the microwave) with a little bit of soap and swish it around immediately after I’ve used the pan, rather than waiting for the stuff to harden onto the sides. Then I scrub it right away, and then use only little bitty spurts of water to rinse off the soap, rather than just turning the faucet on full blast and going crazy. You only need a tiny bit of rinse water, if you rinse, swish, pour, rinse, swish, pour, rinse, swish, pour. Most people tend to fill up their huge pots when they’re washing and rinsing them in the sink. Not necessary.
I also always keep a bucket in the tub/shower to collect the water while I’m waiting for it to heat up. Or I’ll use a big bowl in the sink for the same reason. Then I use that water to pour on my plants or give my “mellow” toilet a flush. We have low flow toilets and don’t flush until it’s necessary. I live in So Cal, so we’ve been mandated to do a lot of these things for years now, so it’s become second nature.
We have those kind of nozzles on all of our hoses that allow you to spray only when you need to, rather than having the hose running the whole time, when you’re watering your plants. Also, we never use the hose to clean off the drive way or the patio. We use brooms.
We have all of our water sprinklers on timers.
If you need to clean out a recyclable container (like peanut butter or margarine) instead of standing there with the faucet running and hoping that the gunk will dissipate, instead get a little bit of boiling water and a spoonful of baking soda and put the lid back on the container and just shake, shake, shake. The baking soda sucks up most of the gunk, so you don’t need to use very much water. This also works for bottles of vegetable oil or bottles of salad dressing that need to be rinsed.
And get yourself one of those rubber scrapers to scrape the leftover junk from your plates (into the trashcan) instead of standing at the sink letting your faucet run while you spray and spray.
We’ve also replaced some of our plants with more drought tolerant plants.
If you suspect that your toilets are leaking, by hearing them running or draining numerous times, even though you’ve not been flushing, have a plumber come out and fix the leaks. You can lose 100’s of gallons of water with a leaky toilet.
Take your car to the carwash, either the drive through kind or the do it yourself type. Just don’t wash your car in your drive way.