www.amazon.com/books Millions of titles, new & used. Free Shipping on Qualified Orders!
www.classlibrary.co/ We help teacher keep track of which students have which books.
ask.com/How+To+Catalog+Library+Books How To Catalog Library Books. Discover and Explore on Ask.com!
www.primasoft.com/Catalog_Library Easily catalogue small library. Small Library Software for Windows.
How I did it: I systematically went through my library and just kept plugging away. Purchasing the bar code reader was a definate help. Not much more to it than just finding time a couple times a month to knock off a shelf at a time.
Lessons & tips: don't look at your library and get overwhelmed. set little goals of just one shelf at a time. don't think you have to be super-disciplined to do it, do it when you want to, otherwise it will be more like a chore than fun.
Resources: The bar code reader that Library Thing offers for sale :)