Data modelling and DAX
A good assistant doesn’t do everything themselves. They send the intern. Subagents are read-only sub-chats your main chat spawns to do the heavy reading and report back. Your conversation keeps its memory.
A good assistant doesn’t wait to be asked. They walk in with a briefing. A trigger phrase in custom instructions fires off a structured routine that reads my calendar, summarises emails, surfaces carry-forward items, and gives me a single morning report.
An assistant that can’t see your real work can only help with what you remembered to tell it. Power Automate flows fix that by dropping calendar events, emails, and Teams messages into your workspace as plain markdown.
Custom instructions teach Copilot who you are. Skills teach it how you work. A SKILL.md file with trigger phrases gets pulled into the chat the moment you mention the trigger.
