If no one will be using the fluorescent light within ten minutes, turn it off. Otherwise, the energy used to turn the light back on offsets the savings from turning it off. Water - Put aerators on all your faucets. They introduce air into the water stream and reduce the amount of water in the stream at any one moment. Yet it still feels like you are using the same amount of water.
Most hardware stores have cushions that can be safely put behind switch plates and outlet covers.
Also, use child protector outlet covers, found in the baby safety supplies areas of groceries and department stores, in all outlets. Filling in these spaces is like closing one or two open windows in your home. When you walk into your closet after having it closed overnight, you will feel the difference and appreciate the savings. Using storm doors on all outside doors of your home also helps. They keep out the first blast of outside air, letting the inside air stay more pleasant.