Give us a notebook so we can write reminders to ourselves about the state of the game, the development plan we’re following, important goals we’re pursuing, etc., so that when we come back to a saved game we can pick up where we left off instead of having to spend an hour clicking on everything to try to get some idea of where we were and what we were doing.
For instance, if I desperately need to build a vault, and for that I need to buy some silver ingots, it would be a whole lot easier (and less frustrating) to just read that than to relearn it the hard way.
Frankly, I don’t know why every strategy game doesn’t offer this. It seems like a no-brainer to me. You might even display the notebook on the screen for the player whenever he loads a save as a courtesy.