Saving water (and money) in the kitchen

Yeah, I take shorter showers, but I still use a ton of water. I’ve been thinking about water a lot lately; specifically cooking liquid and how much of that stuff I toss down the drain. So here are a few ideas I had about saving stuff and using it twice:

Using the liquid from steamed veggies as stock to cook dried beans in. Anyone know if I can do the same with pasta water? I have a sneaking suspicion that the starch will mess things up.

Reserve whey after making cheese and use it for bread making. It’ll last a few days in the fridge, but it’s best used right away and still hot. I gave the recipe for this a while ago.

If I boil too much water for tea, use it to poor over the stove and loosen gunk without degreaser. (I suppose you could just boil it again next time, but I’ve been taught that makes bad tea. And you have to heat it twice anyway.)

I clean off a LOT of veggies daily. I can't use the dirt-filled water for much, but maybe I should catch it and use it to soak pots and pans. Or water the plants outside.

Got any other suggestions? I don’t see any money saved because of the set-rate utility thing, but one day I will leave this apartment for greener pastures where it matters. Best get accustomed now.