Chapter 9 really stresses the importance of being proactive when dealing with network management. It is such a basic sense practice to routinely scan application and service logs because, as you said, it allows technicians to identify and fix issues before they become serious problems. It is like doing preventive maintenance: small issues are resolved before they can cause extensive downtime or security compromise.
I also agree with your comment on disaster recovery. It’s one of those things where it’s easy to overlook until something occurs. Having good plans, clear procedures, and good backups not only protects data but also gives the entire team confidence in case of an emergency.