Wait until you have a full load of clothes before you wash a load. Don't wash a load of clothes just because you want to wear the same pair of pants the next day! When washing your clothes be sure to use the economy mode and this will save you both water and electricity! This goes for dishwashers, too. Load the dishwasher full but not overly full.
Don't wash your dishes before you wash your dishes. Do scrape larger pieces of food waste into the trash or compost. If your dishes don't get clean without pre-rinsing, make sure you're loading properly, that your dishwasher is in good repair, and that you're using an effective dishwasher detergent.
Dishwashers, especially modern, efficient ones, can actually save water compared to washing by hand, since they pump the same water around inside the tub. If you're ready for a new dishwasher, check both energy and water usage before you buy. [1]
Choose your next washing machine wisely, too. Front loaders use far less water than top loaders.
Choose laundry detergents that rinse cleanly and don't require an extra rinse.