Try this technique to schedule deep work directly into your calendar

"Timeboxing is the practice of scheduling tasks and deep work directly onto a calendar. By specifying how long to spend on each task, it helps you create a realistic plan taking into account your priorities and available time."

"Timeboxing might be a fit if you have the freedom to decide what to do when. It's especially useful if you have a sense of how long things often take you and know the daily rhythms of your concentration levels."

Read at Fast Company