Sign up for the GreenIdeas Weekly Newsletter, and you'll receive a free copy of "The Green Living Guide -- a Guide to Home Water Conservation". This e-book provides tips, tools, and strategies for conserving water at home, including a list of water conservation resources by state.

Sign up for a solar installation through Real Goods Solar and you'll receive $500 cash or a $1000 coupon to the Real Goods Solar catalog. California and Colorado only.

Looking to make your home greener? Green Made Simple has a terrific rebate/tax credit tool. You can get up-to-date information on offers from your local utility, and state & federal government; find free home efficiency equipment offers and money-saving programs you can join; and, in many cases, print out the application right from their site. Categories include everything from energy-efficient appliances to solar power to water conservation.

Part handbook, part coupon book, the SunriseGuide is a resource for learning about, supporting and living in a healthy and sustainable way in southern Maine. The guide is packed with tips, resources, and more than 165 valuable coupons for healthy and eco-friendly products and services.

The "Be Local Northern Colorado" guidebook promotes local, unique independent businesses and homegrown, one-of-a-kind products and services. The 2009-2010 features over 260 coupons, representing over $6000 in savings!

Buffalo First's mission is to build a local, green and fair economy in the Buffalo-Niagara region. Their Coupon & Shop Local book includes over $4,000 in savings at local, independent businesses in Buffalo and Western New York, plus a free guide on shopping local and green.

The Go Green Book is San Diego's first green and health-focused entertainment and savings book. The book features over $1,000 dollars worth of savings inside from local businesses.

The Green Savings Indy book offers $800 in coupons and discounts for products and services in the Indianapolis area. The book is published on an Earth Day to Earth day calendar, so the next edition will be coming out in April.

EcoMetro books include coupons, maps, and resources for living green. There are EcoMetro guides for the East Bay, Silicon Valley, Denver, Portland, Seattle, and Twin Cities.

A coupon book, directory, and educational resource, the 2010 Green Zebra guides list green savings around San Francisco.

Looking to go solar without the high upfront costs or the maintenance headaches? SunRun offers a residential power purchase agreement (PPA) in California, Arizona, Massachusetts, Colorado and New Jersey. In a nutshell, it means that after paying a relatively small down-payment, you then only pay for the solar electricity you use, rather than the installation and maintenance of the solar panels. Full details can be found on the SunRun site.

Residents of Washington, Oregon, Massachusetts, New Hampshire, Rhode Island and Maine can enter the Penguin Windows Winter Savings Sweepstakes with a grand prize of $10,000 cash and $15,000 in new windows (a great way to reduce your home energy costs!) By entering, you give Penguin Windows permission to contact you to offer you a free window inspection and estimate.

Receive a 30% Federal Tax Credit on qualifying Solatube products, including Daylighting Systems (angled tubular skylights that add natural light to your home's interior) and Solar Star® Attic Fans, a solar-powered fan that keeps your attic cool. You may also qualify for state and local incentives -- Solatube includes a link where you can find out that information.

Real Goods Solar is having a solar panel sale with discounts up to 34% off, including flexible and film panels.

Refer your friends, family, neighbors and co-workers to Real Goods Solar. For each referral that turns into a solar roof installation, you will receive a referral fee ($250 for first referral; $500 for each subsequent referral!) Real Goods Solar currently has 8 offices in California and Colorado, so please only send referrals in those areas.

Here's a can-do idea! You can save water when you purchase a composting toilet and save money by buying a refurbished unit. BioLet toilets just allow nature to do her thing and break down waste into useful plant fertilizer. The process does not involve bugs or odors, only a slow oxygen fueled composting process. Order one, and you'll also get free shipping and 4 free bags of mulch.

The ENERGY STAR website has the latest info on federal tax credits for energy efficient home improvements. Read all about it so you don't miss out!

Here's something new and different. 1 Block off the Grid (1BOG) connects people within an area who want to get solar energy for their homes, and gets them a discount through bulk purchasing. Sign up to find out if there's a group forming in your area and how you can get involved.

Get free shipping on orders over $40 at DepotEco, where you'll find all sorts of rechargable batteries, solar-powered products, and more. Offer limited to 8 lbs.

The Alternative Energy Store is an online retailer of renewable energy goods, featuring a wide selection of solar products. Check out their clearance page for big savings.