Mail merge in Pages is really handy for sending individually named letters to more than one person. Guest author Jenine Abarbanel explains how to make it work.
Use Numbers.app as an address database
Numbers.app is a superb way to keep a database of names and addresses, a membership list, or any other data which is clearly structured. This Tip explains the first steps in setting up and working with an address database.
Backup iCal and Address Book
iCal and Address Book offer a way to back up their data.
Back up your Address Book
How to back up your Mac’s Address Book.