Speaking of hot water.  Did you know that heating domestic hot water for your home can take up as much as 33% of the total cost?  So what to do about that?

How about supplementing your electric or gas hot water heater with water heated by the sun – the free energy source.

Here is a great book from the same folks that brought you the Solar Wind and Electricity program I have mentioned before, but this time they are taking on a DIY project for hot water for you to bath in and wash the dishes with.  You can see this new book here.  One of the things I like about these folks is how they help you find reasonable sources for the materials you need.  Not only do you save money on your utility bills, but you also save money when you build the project.