Integrating new members via events
Engaged members renew. So work as hard as possible to get new members to your events as quickly as possible. If they don't engage in the first three months it is highly likely they won't engage at all.
Provide incentives and personal invitations for new members to attend networking events. At those events provide icebreakers that involve them talking to strangers. If your association does a lot of networking ensure that you also have mechanisms to subtly teach people how to network. This can be as simple as articles in your publication or something more formal like seminars on the topic.
Welcome/Orientation event for new members
Host a new member reception, for instance, at your conference. This gives new members a chance to meet others who are in the same position. New members can start creating relationships with each other that will ease their way into networking with others in the association. Make sure you include some “old hand” members at the event to mingle and engage with the new members.