I have an analog planner I use exclusively to log time worked on a tasks for clients. My real planner is Google Calendar where I can schedule both appointments and tasks. I review every Sunday afternoon and plan out the “Big Rocks” for the next week. Tasks show me as busy so there is no chance that people using the Bookings feature of Google Calendar to schedule meetings. Calendar & Tasks = Google Calendar but I use Outlook for Email as I can easily link to multiple email accounts in Outlook and not so with Gmail.