A nice way of doing things would be to have every quest turn on a switch... Then, when you come back, you can go to a specific character or use a certain item.
That item or character (the char would probably be a fortune teller or something...) would give you a quick rundown of what you were working on based on which switches are active.
Of course, then, the last part of the quest would have to have a turn event off switch, so the item or NPC will not keep telling you about that quest...
Using conditions, you can keep track of several different quests at once... At least, you should be able to...