The bookmark for taking notes

I've recently started taking notes from the books I read using the technique of Doug Neill from Verbal to Visual. The concept is very simple: you take one A4 sheet of paper and fold it in thirds so that it doubles as a bookmark and a notepad. I suggest watching the whole thing. Compared to notes written on a single sheet of paper, I find that notes written in this way are much easier to read. As a result, I'm more likely to work on them for blog posts or visual book summaries. And if you run out of room for notes, you simply add another page.