How do you keep track of important insights from very long ChatGPT conversations?

I’ve been using ChatGPT a lot for coding and problem solving, and over time my chats have started getting really long - sometimes hundreds of messages of back-and-forth while debugging or refining an idea. At the time it feels fine because the model remembers everything. But a few days later, when I try to revisit the conversation or reuse something we figured out, I end up scrolling forever trying to find the one message where the actual solution or key insight was written.