HouseLogic.com is a free source of information and tools—from the NATIONAL ASSOCIATION OF REALTORS®—that can help you make smart and timely decisions about your home.  With content covering home improvement, maintenance, taxes, finance, insurance, and even ways you can get involved in and enrich your community, HouseLogic can help you increase and protect the value of your home by helping you make confident decisions.

I thought the article about Spring home maintenance projects was great.  Also, if you are thinking of replacing your roof soon, you might start by getting the basics for your research on this site.