I'd suggest practicing it for half an hour repeatedly, and then if possible present it for a partner, and they should watch you and follow along in the workbook, making mental notes about whether you were anticipating certain actions, performing certain actions or just 'doing' them, truthfully, without any need to perform or be applauded as interesting. The more you practice this, the more you get into the habit of allowing the mind to think of all acting as spontaneous, that you have no idea what's going to happen next, you're just going with the flow. It's a very simple but very useful exercise in your future work.
How many times should I do it??
I'd suggest practicing it for half an hour repeatedly, and then if possible present it for a partner, and they should watch you and follow along in the workbook, making mental notes about whether you were anticipating certain actions, performing certain actions or just 'doing' them, truthfully, without any need to perform or be applauded as interesting. The more you practice this, the more you get into the habit of allowing the mind to think of all acting as spontaneous, that you have no idea what's going to happen next, you're just going with the flow. It's a very simple but very useful exercise in your future work.