When a new version is released, I ask the version what its goals are for the prompt. I learned that GPT4 wanted to be "creative" and "helpful" in equal measure for "user discovery" which I told it to stop doing and the results got better. You have to battle the initial prompt away with your own, and it's easier if you ask it questions about its motivation/prompt, first. If you have the primo sub you can make your own GPTs and you can preload them with 20 files and 8000 characters of pre-prompt to battle the company-issued prompt ;) Mainly the files are what lets me do things on which the other GPT faulters.