Conducting regular Tabletop exercises ensures the incident response team is familiar with the incident response plan and is prepared to execute it effectively. During these exercises, scenarios are simulated, and the team walks through the plan step-by-step to identify any gaps or inefficiencies. This practical approach to incident response preparation can significantly improve the team's readiness and capability to respond to real incidents. Revising the disaster recovery plan might be part of overall improvements, but it is not as directly related to the immediate incident handling effectiveness as conducting regular exercises. The other options, although they might be components of an incident response plan, do not directly ensure more effective handling of future incidents.