It isn't easy being green, but it might be fun

I normally do new-year resolutions on my birthday, but I don't want to wait until May to start on this one. I resolve to make our house greener this year. Here's a list of potential projects:

1. Put solar panels on the roof and an inverter in the garage so that I can sell electricity to the city during the day and buy it back in the evening. Austin is one of those cities that not only allows this, but encourages it with a rebate of up to $4.50 per watt (capped at 80% of the cost or $13,500, whichever is less). Since a typical system costs from $6 to $10 per watt, this could be as much as a 75% subsidy. More information here.
2. Make the sprinkler system more intelligent. I had a few very expensive water bills last year because of leaks in the sprinkler system. A master solenoid valve would have eliminated leaks due to faulty zone control valves. And if I wanted to get really fancy, I could add a flow meter and monitor water usage so that if there were a leak I could find out right away.
3. Put in rain barrels. The city sometimes subsidizes these. I wonder if I could use the swimming pool as cistern. I'd guess there is at least 500 gallons storage between the low and high levels of the pool.
4. Replace toilets with water-saving models.
5. Replace washer & dryer with modern, water / energy-efficient models.
6. Replace refrigerator with modern, energy-efficient model.
7. Replace air conditioner / heater with modern, energy-efficient model. (It might already be that.)
8. Use compact fluorescent or LED bulbs.
9. Plant a garden.
   

I do plan to continue to invest in the stock market, but in case it has even further to drop, I like the idea of investing some money in a more energy-efficient house. Besides, if the world as we know it collapses, it would be nice to have an efficient refrigerator and the means to power it.