Pick a minimal set of signifiers you can recall under pressure: dot for task, dash for note, circle for event, star for priority, arrow for migration, bang for idea. Keep it on the inside cover. Consistency beats creativity here, reducing friction every time your pen lands.
Give each collection a clear title and page number, then record both in the index. When it grows, use threading: note the next page where the collection continues. This one habit ends flipping marathons and makes your notebook feel like a living, searchable workspace.