Don't Waste/Pollute Water Sources
The first thing to do at home is to avoid letting water run continuously or leave taps partially open. Make sure that taps are not leaky, or left unattended without use. This would help greatly in conserving water. Another helpful gesture, is to use CFL bulbs, since it's not only energy-saving, but cuts down on electricity costs as well. When exiting rooms in your home, be sure to turn the lights off as you leave.