RPO, RTO, and Retention
All system objects must have a documented Recovery Point Objective (RPO) and Recovery Time Objective (RTO).
Physical servers are objects, each application is an object, each application's data is an object.
Knowing the recovery point (time of backup) and recovery time (amount of time to recover), along with their respective recovery steps should be documented. The result, less downtime.
Testing is everything. Without a good test practice in place the backup strategy has zero qualification.
We implement routine testing to ensure systems and applications are running, and available.