Some years ago I saw a rebooted version of "The Karate Kid", starring Hong Kong action star Jackie Chan and Will Smith's son Jaden. The movie took place in China, which is kinda odd considering karate is a Japanese thing and Chinese in general hates Japanese, but I digress.
Call me odd but the one thing I remember the most about the movie is the scene where Chan's character informed Smith's character that in China turning on the faucet for hot water requires waiting a little bit for the water to get boiled. There is an additional switch to tell the water tank to heat the water. It's a good way to save water, at the cost of some amount of time. When I recently replaced my water tank, I was excited to finally get one like that. Alas, it turned out to be too expensive for the budget, so I ended up with the same old system. I would waste some water by spraying the initial cold water down the drain while waiting for the water to get hot. At some other time, my bathroom sink got worked on and the strainer was replaced by a screwable piece. Instead of having to dismantle the pipes below the sink, each weekend I would unscrew the piece and clean it with paper tissues. Recently, it dawned on me that I can put to work the water that would otherwise be completely wasted. I would unscrew the piece from the sink, hold it under the shower head, then spray it with the cold water while waiting for the water to warm. I have a bow to collect water for use as brown water, to flush the toilet. The nasty stuff would come off the sink piece after being hit by the shower head. I feel a little better with the lesser waste of water.