Your ability to write thoughts down is much better than your ability to remember it.

Take advantage of this and always have a notebook with you when you are on a vacation or a trip.

If a physical notebook doesn't suit with you, you can use a notebook app on your phone instead (Like Obsidian, which is what I am using).

If you chose the notebook app path, make sure that you can easily access it, by placing the app in the home page.

Whatever you choose to write your notes, always remember: The point of taking notes is about writing, not crafting the perfect note-taking system.