Over the years, my contacts list has become kind of crufty. Which is no surprise, really, as I’ve essentially used the same list since I owned a Palm Tungsten C back in 2003. I keep backing it up, moving it to newer, better devices and systems, but over time, there are serious issues in that database.
Like duplicated contacts, for example, each with a different subset of addresses, phone numbers, and email addresses. It’s a pain to go through them, one by one, and copy over information from each duplicate contact to a final, master contact for each person in my list. The OS X Contacts app, though, has a couple of helpful features to make this a bit easier.