What is a default diary?

In short, a default diary is when you book out blocks of time to do specific tasks at a specific time.

The theory behind the concept is that you do not get stuck on one specific task which overtakes your entire day when you had to accomplish an array of other important tasks.  Essentially you ensure that you get to all the important stuff in your day without compromising any other task.

How do I start a default diary?

Sit down and work out what are the tasks that you need to accomplish on a daily, weekly, and monthly basis. Firstly start with the things in the day that need to get done at a particular time.

For example of you need to call someone at 1pm. How long roughly will that phone call take? 30 minutes? block out 1-1.30pm.

It is going to take some time to fine-tune your default diary.  It is going to take time to get used to the idea.  There will be changes for each season.  Even for each month.