How often do you send a specific one-to-one communication to your members?  Maybe a "welcome" letter when they join and then an invoice when they need to renew...right?   Most other communications are newsletters, "mass" emails (even if customized) or other generic method. 

Surprise them.  Send them a valentine.  Wish them a happy St. Patrick's Day.   Call them just to say "hi" and see how they are doing.  Try something unexpected to show them that you're glad they're a member.  Send them a $5 Starbucks gift card and tell them you'd like to meet them for coffee.  How about a personal email that you typed just to them?

Yes, you are busy and they are busy, but in today’s world of media overload, I'll bet they'll appreciate a genuine out-of-the-blue, personal communication.   Sure, this will be hard to do for all your members at once....so do it in chunks.  Do something special and different each month or each week for a few members and cycle through them over the course of the year.  Break up your members into segments using your membership management software to help you create more personal communications. 

I think you'll enjoy the results.