The direct answer
Automate the work that's repetitive and low-ambiguity first — reporting, dashboard assembly, basic QA, and briefing document generation — before touching anything that involves a judgment call like budget allocation or creative strategy. That order protects quality while still freeing up meaningful time.
A simple test for what to automate
Ask whether a task requires weighing trade-offs a human would disagree about, or whether it's assembling information that already has a clear right answer. Pulling last week's CAC into a dashboard has one right answer. Deciding whether to shift 20% of budget to a new channel does not.
Name the system, don't just use the tool
A one-off use of an AI tool isn't an automated system — it's a shortcut that disappears when the person who used it leaves. A real system is documented, owned, and connected to a specific outcome, which is what separates AI-native operations from ad hoc AI usage.