Tell me about mistakes you've made while playing The Sims 3

I just remember my biggest goof up. I had started using mods, and removed the 8 sim limit per household. I started out with a family that had mom, dad, son, and grandmother. For some reason this family was very fertile, and had 2 sets of babies born, both time it was 4 babies, which ended up leaving me with 8 babies, a toddler, mom, dad, and grandmother, and a game that lagged something awful.