Don't dump the remainder of your glass of water down the sink. Energy went in to purifying it and getting it to your house. Instead, pour it in your dog's water dish, or your watering can for your plants. They won't mind the backwash.
If you rinse your dishes before putting them in the dishwasher (like I do), try rinsing them and stacking them on the counter as you rinse them, then loading them all in the dishwasher at once when you're done. That means you're not wasting water while trying to arrange and rearrange dishes to make them all fit.