On the water heater - lowering temperature setting is good but I also have a timer that turns it on and off at certain times of the day when I know I will need more hot water (mornings and evenings).
It's a basic timer like this one:
Going to LED vs. halogen where possible is also a fantastic way to reduce electrical consumption.
For anyone who has low voltage landscape lighting, you can swap your bulbs out in most cases (depends on your fixture sometimes). Walmart has the best prices now on these but you can also buy at HD. All come with various warranty periods.