Did you have a New Year's resolution to organize your book collection (again)? It's definitely on the list in our household, but it's a daunting job; we have thousands of books (literally and literarily) scattered across many shelves, basement boxes and a home office, plus another whole library at my wife's office in desperate need of some database love.
A bit of luck, though: bibliophiles have a leg up on most other varieties of packrat, as almost all modern books have an ISBN, a number that purports to uniquely identify them. Capturing that ISBN may be a manual process for older titles, but for anything published in the last few decades there's almost certainly a