I'm still struggling with inspiration, but I thought I'd share a common practice of my own.
I create a male and female sim in CAS and randomize both. I use CAS to give them an adult child. I do this three more times (randomizing the same original sims over again to save space) to result in four adult children, two men and two women. Those four sims form two pairs to create two more adult children, a man and a woman. Those two then produce one final sim, male or female, depending on what I'm looking for. This is a fun way to make sims when their appearance isn't really all that important. It's really fun with pets, too.
For this one, though, I feel like I should put more intention into it.