Well, maybe if you have pets getting a new dog and having it cause catastrophe all over the house would spice things up a little? If you have generations, you could also have your teens pull a lot of pranks. Or, you could start a fire willingly, and then put them on high free will and watch what happens, once I did that, my spare died, but I managed to save the heir. Luckily, I stil had another spare. I was trying to make a storyline and the spare that I had neglected the most died. In the story line I had been making,(in my head,not actually putting it down in any form of writing.) it was the spare that was jealous of the heir because she got everything but the heir was jealous of the sister for not having much responsibility. The mom also died. But I managed to get them both resurrected but then the sister and mom went back to the netherworld and in the storyline it was because they were causing trouble. But nobody else wanted them to go. Yeah, sorry for getting a little of topic. But I hope that gave you some ideas.
