I was making myself some ramen the other day, and I needed two cups of water, but my measuring cup was dirty. I thought to myself that there had to be a way for me to measure two cups of water into the pot without having to clean a dish. After a few seconds thinking...

1. Turn on the faucet midway
2. Put the measuring cup under the faucet
3. Start counting
4. When it hits two cups, stop counting
5. Put the pot under the faucet
6. Start counting
7. When you hit your original count, take the pot away and turn off the water

And, to the inevitable clever reader who says that I'm wasting water doing that, remember that washing a cup takes three times the water of filling a cup, so I saved there, too.