What calendar/ organization system does Brooke use?

I LOVE the concept of putting my (massive) to do list on a calendar, assigning it a specific amount of time, and getting it done. I’m always curious about how super effective people organize themselves, and wanting to learn and incorporate new, better ways of managing my time. I’m currently using a combination of Google calendar/ iCal and the Bullet Journal…so, electronic and manual. What calendar and organization systems do you use? Manual, software, or a combination? What specific programs/ formats? Thank you…much appreciated!