A few weeks ago, I came across this wedding registry site, HatchMyHouse, that allows couples to put items of a house on their gift wishlist instead of the typical serving tray and fine china.

So I was thinking, wouldn’t it be awesome if you could have your wedding guests contribute to a pot of money that would allow you to renovate all your windows to double-paned ones, which are more energy-efficient.  Or even to help you put a down payment on a solar pv system.  Depending on which financing program you qualify for, you could get a solar pv system installed on your roof for as cheap as $250 a month.  The potential to educate future homeowners about the most cost-effective ways to save money on their new home is huge and what better time than right after their honeymoon. :)