When planning a large event, it can sometimes feel like keeping a ship afloat that's full of holes. You plan as much as possible, but as the day approaches more and more tiny holes begin to form. And if you ignore a hole for too long, it can grow and sink the ship.
Those holes are the nagging details that require your attention. The holes do not go away and must be addressed, but sometimes you must prioritize which hole is repaired first.
A single person cannot repair every hole themselves either. It takes delegation, trusting your teammates, and even teaching someone else how to plug the holes. Don't let your next event fall off the edge, push to fix every hole before you take on too much water.