Being patient while the next game session rolls around can be a challenge. As a player, I want to dive in and go full bore into what the GM has prepared for us.

As a DM I need patience waiting for the players to find some really cool idea I have planned out. I don’t railroad the players, so if they never find it, my desire for them to find it and seeing their reaction to it goes unfulfilled.

There are just too many cool ideas out there, it is hard for any DM to get enough players in enough groups and manage it all to have any hope of all the cool ideas being found.

This is why it is good advice to only prepare enough to give the players a choice in the direction they go and what they do. If the players decide to go in a certain direction/focus, they may never get to something you put a lot of effort into.