watergeek: wow! this question is right up your alley!
Brina: there are a couple simple things that most people overlook. both are about food.
first, cut down on meat. cutting down means cutting down (not stopping) so calm down. growing livestock and butchering meat uses massive amounts of energy and water. the crops that livestock eat need water and lots water is used to handle livestock waste. also, livestock waste seeps into the ground, destroying groundwater. a bowl of oatmeal in the morning will save more water than bacon and eggs.
next, eat local and seasonal. the more companies between you and the farmer (transportation, storage, etc) the more water and energy is used. local isn't always easy but start at your local farmer's market.
i'm guessing the rest is covered by watergeek.