Best workflow to turn long ChatGPT chats into clean Custom GPT instructions?

Hi everyone, I’m trying to improve how I use ChatGPT/Custom GPTs for long-term project work.

I often have long chats where I build up useful instructions, rules, workflows, and project knowledge over time. The problem is that those instructions get buried inside the conversation, and I want a better way to extract the important parts and turn them into something reusable.

What is the best workflow for turning a long ChatGPT conversation into:

1. Clean Custom GPT instructions

2. Project instructions

3. Knowledge files/source documents

4. Reusable prompts or SOPs

5. A system that avoids duplicate, outdated, or conflicting instructions

I’m especially interested in using this for business, automation, AI learning, content systems, and wealth-building workflows — but I want practical execution, not hype.

Is there a recommended method, prompt, tool, or structure people use for this?

Also, when would you use:

- Custom Instructions

- Memory

- Projects

- Custom GPTs

- Uploaded knowledge files

What is the cleanest setup for someone building multiple long-term AI-assisted projects?

What I do for long term and long projects, and thankfully OpenAI has provided the Library and files aspect to the service, is the following:

Tips, from my workflows:

  • Projects for the relevant chats
  • Obsidian Web Clipper to a dedicated Obsidian MD Vault to have a full copy of the chat
  • For longer Chats always ask for a comprehensive recap to take into your notes
  • Should you have the need to archive chats, bookmark these on your browser to be able to access your chats faster and un-archive them, organize them accordingly
  • Store recaps in knowledge and treat them as living documents, replacing them as needed

Memory Related:

For memory and global custom instructions set a constraint of which aspects you don’t want to carry over to other chats. Same goes for enabling and disabling the access to memories in individual projects

Wish I could have:
Chats to be tagged as not-to-be-archived. Finger crossed :crossed_fingers:

Hope this helps.