I have routines and schedules :D
I only play with one family, so it’s pretty easy to plan out my sim’s schedules and establish routines. Each family member belongs to at least one club, so I schedule out when their club meetings are. I keep that schedule in a spreadsheet for my reference. I’ll also schedule dates, gym days, and vacations in advance. Other than those activities, my sims have routines. The typical wake up, hygiene routine, breakfast, kids to school or parents to work, chores, hobbies, dinner, and then family time to round out the night.
Sometimes I play without a set plan, but that’s not as common as the prior. I guess I’m just an organized simmer!