Organize your notes

Take some time to update the Residents of Stonetop and the Notable neighbors on the steading playbook. Include each NPC who was established, with their occupation, connection(s) to the PCs or other NPCs, and perhaps a notable trait. (You can leave the trait off for now, and ask the players about them in play.)

Space on the steading playbook is limited and the playbook can be hard to update in play. Also, you might have notes about NPCs that you don't want the players to see. Consider recording your NPCs on a spreadsheet or other electronic document.

If you're a visual thinker, consider making a relationship map. Each "node" on the map represents a character (PC or NPC). Cluster characters together by location (Stonetop residents here, Hillfolk there) and further cluster them by affiliation (the Initiates of Danu, the Marshal's crew, etc.). Draw lines between characters and groups, with a note describing the relationship (like "mother/daughter," "budding romance," or "watching closely"). A relationship map helps you and your players "see" the social landscape of the game, but it requires a lot of work to create and maintain.

Create a timeline, arranging the events that your players established from oldest to most recent.

As you organize your notes, you'll find contradictions like "Vahid got here last year, but Blodwen was initiated two years ago—he couldn't have participated in the initiation rites!" Either ask the players about them (before or at the start of the next session) or just make a decision about how to correct the contradiction if you think it's a low-impact change.

Flip through Book II and look for potential connections to the PCs and the details you all established during introductions. For example, if Rhianna's predecessor died five years ago fighting bandits, then maybe those bandits were Brennan and his Claws, who now run the Marshedge Guard. If you're okay with just deciding that such a connection is true, add it to your NPC notes and/or timeline. If you think it might be true, but aren't sure, then add it to your "I wonder..." list.

Share your updated list of NPCs and your timeline with the players. Ask them to review it before the next session, to help get everyone on the same page. Point out any lingering questions for them to answer, and any changes that you've made. Ask for feedback, and incorporate it as appropriate.