Re: my buddy Austin’s recent post on indexing notebooks, for most of the last decade I have used Leuchtturm notebooks, which helpfully have index pages at the beginning. And I have faithfully used those, but I have not found them especially useful. What works best for me is this: Whenever I start a new notebook I devote the first few pages to summarizing the most important ideas from the previous notebook. I also have a monthly text-file journal on my computer, and each time I start a new month I do the same: write down what seems most important from the previous month.