1. Fix leaky faucets.
2. Do laundry back to back instead of one load a day. Do large loads instead of lots of small loads.
3. Scrape food off dishes ahead of time to save water - don't rinse under running water.
4. Iron several articles of clothing at one time. Don't get out the iron, heat it up and cool it down for only 1 article of clothing.
5. Don't leave the fridge open while you are trying to decide what to eat or make. Think about what you want ahead of time to minimize the amount of time the door is open.