From Jamie Todd Rubin:
To add structure, however, I began numbering my journal entries. My idea was that the numbering would continue from one volume to the next, rather than restart. That way, I could index my journal based on entry numbers instead of volume/page number. It also meant I could refer to previous entries by their number.
Practically Paperless With Obsidian, Episode 27 Use Case Journal Writing in Obsidian