A "salutary reminder" means a useful or beneficial message that helps us remember something important or makes us aware of potential dangers or consequences. Full definition
For me, the study is a salutary reminder that one can not just assume pooling of family income. (progressive-economics.ca)
Our visibly fractured fellowship at the Lord's table can, at the same time, be a salutary reminder of how far we are from the goal of complete unity, and a spur to more urgent prayer and work that one day the prayer of Jesus in John 17 will be fully answered. (firstthings.com)
Perhaps the unsatisfactory outcome of this unhappy time is a salutary reminder that genuine reform and renewal has to begin with each one of us. (firstthings.com)