However, I'm certain I have duplicate info, and, worse for a data-driven geek like myself, bad data
Cheap storage and good search tools have made this something of a non-issue. But I like my data clean and accurate. Plus, this does provide opportunities for confusion. I have a few folks I infrequently email, and have with multiple email addresses. I'm sure only one is accurate or active. So when I email I send it to all, then clean out based and bounce-backs. Not efficient, but effective.
I've thought about tools like Plaxo, but have found many folks won't respond. Facebook solves many of these problems. Most of my friendly contacts are on FB, so I don't need a contact at all.
So, I've identified a problem, but not a solution. Or even if its worth the time to repair. But it nags at me.