The circular practice can be applied to almost any activity in your life. It is a practice that builds learning and improvement into whatever you are doing.
The practice has four steps; hypothesis, plan, action, and reflection. The steps are repeated which is why it is called the circular practice.
The first step is one that many people miss. It involves creating a hypothesis about the activity which the plan and the associated actions are going to test out.
The second step is creating a plan, both to move the activity forward and at the same time to test the hypothesis.
The third step is to execute the plan for a certain length of time.
The fourth step is to evaluate and reflect on whether the hypothesis is correct or needs to be adjusted.
As an example, if you have a goal to lose weight your initial hypothesis could be that running on the treadmill five times a week will get you to your goal. When you are making a plan and part of the plan is determining the validity of the hypothesis you may include some reading on weight loss, metrics for progress, and tracking your diet. This will give you information when evaluating the hypothesis and determining if there is a better one.