The lost art of customer retention #THINKmarketing @BrennerMichael https://t.co/SqdJ2qGAd8 https://t.co/bKtFZOUUqx The lost art of customer retention #THINKmarketing @BrennerMichael https://t.co/SqdJ2qGAd8 https://t.co/bKtFZOUUqx Tweet Pin It