Creative Collaboration
Source GM Core pg. 19
You might have players develop the stories of some of the regions or NPCs, while your contributions serve as the glue that makes it all work together. This breaks somewhat with traditional RPG structures, in that you might not be the expert on all areas of the setting and plot.
Your collaboration will depend on the interests of you and the other players. Maybe one draws a city map, another makes the stats and personality for an NPC, another controls some monsters in combat, and a fourth doesn't want to do anything beyond playing their character. There's a trade-off here, because while you'll be off-loading some of your work, you'll also need to ensure consistency across these multiple sources of ideas. It can really help to keep a log of which player is in charge of each part of your setting. If you expect one of a player's specialties to appear in an upcoming session, let them know ahead of time so they can prepare or discuss their ideas in advance with you.
Your collaboration will depend on the interests of you and the other players. Maybe one draws a city map, another makes the stats and personality for an NPC, another controls some monsters in combat, and a fourth doesn't want to do anything beyond playing their character. There's a trade-off here, because while you'll be off-loading some of your work, you'll also need to ensure consistency across these multiple sources of ideas. It can really help to keep a log of which player is in charge of each part of your setting. If you expect one of a player's specialties to appear in an upcoming session, let them know ahead of time so they can prepare or discuss their ideas in advance with you.