Hoping this is common sense to everyone -
- Restart your phone and computer every day, after checking for updates. Once a week is better than never.
- On Android, remember to also update "System services" section in Settings, in addition to Play Store apps, Google Play system update, and the monthly OTA.
- On iOS, remember to update App Store apps in addition to iOS, and check for firmware updates for AirPods etc.
- On Windows, there's also the Microsoft Store, Office updates, winget (easy to update with UniGetUI), and any manually installed apps and games, and your drivers and firmware to check.
- On Linux, "apt upgrade" isn't enough, you also need to update the cache, snap, flatpack, fwupdmgr, and apps on the Ubuntu Store.
- And remember to update your router, TV, consoles, headphones, smart watch, and IoT devices. If it connects to the internet, it gets updates.
Update coming soon with scripts to automate keeping Windows and Linux up to date.