Nobody can resist pictures of themselves.
New social networks are confusing to a lot of people. Tell your family and friends that you'd be happy to answer any questions they have about Google+.
Instead of talking to your people by phone, tell them you'd like to do a hangout. Once they've tried that, they'll be hooked.
Sometimes, people are just confused. Personally help them set up their account and start following people.
One major complaint by new users is that there's nothing happening. That's because they haven’t circled anyone yet. You can help them fix that. First, share this link with them to give them a “starter circle.” If they still think nothing's happening on Google+, share this link+.
Posting, uploading, hangouts, comments, Plus-oneing -- activity makes Google+ rewarding. So set a good example, and encourage others to not just lurk, but participate. They'll understand the value of Google+ once they do.
You’ll be doing them a favor.