Oofta
Legend
The primary thing I do is take notes and have a who's-who list that I add to. Then as I go along, I kind of just throw some random things in there that the group may find interesting or may be nothing at all. But the kicker is that while I may have an overall high level outline of things going on and where things might head, it's not set in stone until it's confirmed by the players. Even then, sometimes what is confirmed could just be subterfuge.
So if I don't plan details ahead, then how do I drop "hints"? I cheat. Remember that vendor you met back in session 3 with the purple hat? Well, it turns out that was really the head of the rogues guild, a polymorphed black dragon! Did I have any clue that the vendor was in the rogues guild, much less that the head of the rogues guild was a black dragon? Heck no. I'm just reusing what turned out to be a memorable/interesting PC, one of many PCs I've thrown out there.
In other cases when direction changes on my I'll make ties in the new campaign that just happen to connect. The group was initially hired as an escort/guard for a researcher who mentioned a mysterious benefactor funding his expedition. I had no clue who the benefactor was, but now that they're in the city, it can be one of heads of one of the handful of evil organizations I'm setting up.
So if I don't plan details ahead, then how do I drop "hints"? I cheat. Remember that vendor you met back in session 3 with the purple hat? Well, it turns out that was really the head of the rogues guild, a polymorphed black dragon! Did I have any clue that the vendor was in the rogues guild, much less that the head of the rogues guild was a black dragon? Heck no. I'm just reusing what turned out to be a memorable/interesting PC, one of many PCs I've thrown out there.
In other cases when direction changes on my I'll make ties in the new campaign that just happen to connect. The group was initially hired as an escort/guard for a researcher who mentioned a mysterious benefactor funding his expedition. I had no clue who the benefactor was, but now that they're in the city, it can be one of heads of one of the handful of evil organizations I'm setting up.