Log on to Facebook to start searching for your friends (see Resources below).
Head to the "My Friends" page. You will see a list of your current friends with a few quick details about them.
Click on either the "Friend Finder" tab or the "Search Your Address Book" link to import your contacts. Both will take your to a short form asking for your external email address and password.
Enter your email address and password in the proper form fields. Only contacts from Hotmail, AOL, Gmail, MSN and Yahoo accounts can be directly imported, as you'll notice from the drop-down menu.
Click the "Find Friends" button. You will be taken to a page with your external address book specs, including a count of the contacts who are already your friends on Facebook.
Check the boxes next to the contacts you want to add and hit the "Add to Friends" button. Your request will be sent to your friend's account for their approval.
Follow the "Search" link after logging in to Facebook. You will be given the option of searching for people in and out of your network.
Enter a name in the "Search For" box. You only need to enter two letters if you aren't quite sure of the spelling. Use the drop-down menu to select the network you want to search.
Use "Advanced Search" if you want to find a friend based on criteria that include his or her email address, favorite activities and political views.
Click on the "Add to Friends" link next to your friend's name. While you can't view his or her profile, you can use the photo and basic details to decide if you're adding the right person.