Six months ago I held the belief that someone should only send or accept LinkedIn connection invitations to former colleagues. I was wrong.
The error in my thinking revealed itself while reading a news release stating that LinkedIn had grown to 250 million individuals worldwide. That meant that my 260 connections represented only one in 10,000 members of the LinkedIn community. Even when taking into account the extended professional network I could still only see one of 1000. As confident as I was in the quality of my network, there were many more former associates and colleagues that were invisible to me because I could not search outside of my professional network.