how do I save my contacts from iphone

You should have set this up when you first started your iphone.

iPhone User Guide (For iOS 4.2 and 4.3 Software)

If you haven't synced your contacts to your Mac's AddressBook, the utility program, PhoneView, displays your entire contact list organized by contact group. Simply drag contacts to the Desktop to save V-card files or send contacts directly to your Mac OS X Address Book. http://www.ecamm.com/mac/phoneview/