It isn’t just saving ideas. It’s about having conversations with your past and future self, so you can develop ideas over time.
I’ve been experimenting with several PKM (Personal Knowledge Management) tools such as Bear Notes and Obsidian. This includes a relatively new feature called back links where you can attach several similar notes to each other. By using double brackets such as [[Photography]] in any note related to photographs each relevant note can be pulled up and referenced easily.
This has been a huge timesaver for me as I’ll jot down notes, messages or links for reference. In its own way, I can go back in time and pull out these notes and develop my chain of thoughts more accurately.