This helps me with planning marriages and partnerships. I also color code my spreadsheet so that I can see at a glance how many Sims of each age group currently do not have partners. These are the things I keep track of for each Sim on my spreadsheet: If you don’t, you shouldn’t let that stop you from playing this way! Just find a way that works best for you and that you enjoy. This is just my preferred way to track my Sims because I enjoy spreadsheets and data. You can play without tracking at all, or keep a much simpler system (like a piece of paper with family names that you check off – or even a notepad on your phone). Of course, it isn’t necessary to keep a tracking spreadsheet to play The Sims 4 rotationally. Preview of my Sims 4 Tracking Spreadsheet (Click for larger view.)
It helps me plan my game by allowing me to see all my Sims at a glance, decide who might be a good match for each other, and just keep my population organized.
When playing rotationally, a spreadsheet helps me keep track of all the Sims in my worlds, their partners, their careers, their aspirations, and any other information I need. Similarly to my Sims 2 tracking spreadsheets, I also keep spreadsheets in The Sims 4.