If this is unclear, I can explain it better, but for now I'm going to be as brief as possible.
I have many stories that interweave with each other, spanning a couple hundred years, and containing long-lived characters. Eventually they'll be posted online. As for my problem, does anyone know how I could handle the plotlines so nothing gets spoiled on accident? For example, when a specific event occurs in one story, but is also significant in another, to the point of being equally important.