A collection of lists (30s and others) that can be referred to at the table.
What happens? Are you kidding me?
Save/Help the Halflings! They offer rewards. Material and otherwise.
Have you ever been in a position where you needed a quick break but your players were too ancy to break as well?
You receive a vision of a rooftop "somewhere close by", where a rare moss grows; in the vision, you know the moss is suitable for greatly enhancing the effects of certain types of potions. Now go and find that rooftop. Don't fall off. (Of course, rooftop runners *will* be taken for miscreants by the local City Watch....)