A calendar with four meetings can look half empty. Preparation, travel and the notes you need to send afterwards may fill the rest of the day. Planning only the visible appointments gives you a misleading picture of what is available.
Take tomorrow's first appointment and write down what must happen around it. A call might need ten minutes with the document beforehand and another ten to record the decision. An appointment across town needs the journey in both directions. Put those blocks beside the event.
Add the surrounding work
Use rough estimates at first. You can adjust them after the day, when you know where time actually went. Include a gap to eat or move between places. If adding these blocks makes the day overflow, decide what can move before promising another task.
Some calendars are shared, so mark private preparation time simply as busy. The aim is to give yourself a usable view of the day. Tomorrow evening, compare one estimate with what happened and change that kind of block next time.
