Say you open a new chat and ask for a quick dinner idea. You get a long, formal answer with a two-hour recipe, when you wanted something short and friendly. A new chat often starts with no idea who you are, so you end up typing the same background again and again.
Write your note once
A personal instruction set is a short note that tells AI how to talk to you before you ask anything. Say you spend 10 minutes writing this:
Keep answers short and practical. Use bullet points over long paragraphs. I live in a small apartment with two teenagers. I cook on weeknights with about 30 minutes. Skip formal language and talk to me like a helpful friend.
Save it on your phone. Next time you open AI, paste it at the top, then ask your question. The answers start to fit your life, with recipes that fit a 30-minute window and trip ideas that allow for young kids.
Save it in settings
Some tools can keep the note for you. In October 2026, ChatGPT had Custom instructions and Memory under Personalization in settings. Gemini had Saved info under Settings & help, then Personal context, for people who are signed in and 18 or older. Claude had Instructions for Claude in Settings. Menu names change, so look under Settings or Personalization. Features can differ between free and paid plans, and the copy-paste note works in any tool.
Keep it private and current
Share only what you are comfortable with. General details like your city are enough. Leave out full names and addresses, and never share account numbers. Update your note every few weeks.
How I want you to talk to me: [tone], [length], [format], [things to avoid]. About me: [city], [household in general terms], [time I have on weeknights].
What would you put in your instruction set?
Yesterday was the school email in plain words (opens in a new tab). Day 21: the last day, and a look back at all three weeks.
The instruction note example is a constructed scenario. How this was made: AI helped in formatting. See the AI use and editorial policy (opens in a new tab).