Final answer:
Key actions for improving human performance include analyzing systems, honing job-specific skills, and staying updated on developments in the field.
Step-by-step explanation:
A key action relative to improving human performance in a training and development (T&D) professional is to analyze systems to identify areas for improvement. Improving human performance by analyzing systems helps identify inefficiencies, gaps in knowledge, and areas that need additional training. Another key action is honing job-specific skills by investing time in learning the necessary skills to perform well in the role. This includes staying updated on developments in the field through attending conferences, joining associations, and registering for webinars.