In the summer of 2012, many areas in the U.S. and Australia had a severe drought. People posted on message boards about using less water. They also reused water that used to go down the drain.
Some folks in very parched areas are saving the rinse water from the washing machine. They pour it back in to the washer to be the wash water for the next load. In a drought situation, whether a drought of water or of money, there are ways to do less laundry.
Outer clothes that are not actually dirty can be hung up, either indoors or out in the fresh air, to air out before wearing again. Sheets can be aired instead of washed, perhaps every other time. You can reuse towels more times if you hang them up so they dry instead of souring. If your washer has settings for different levels, only use as much water as you need for the load.