DM’s All-in-One D&D Journal: An Outstanding Workbook for Any Dungeon Master

This is a great book for organizing your DnD notes, there is good section for general session and world notes. The are sheets for characters, monsters, spells, and magic items. There are even some blank tables that I find super helpful for coming up with random events or consequences. It's really nice to have one place to organize all my DnD notes.