Yes, Lung Matters has a number of good tips about dealing with bronchiectasis. They are a proponent of airway clearance, which is the cornerstone of bronchiectasis treatment. In that way, they've done a tremendous service to the suffers of this disease. Leaving a sputum before abx treatment is also sound advice.

The rest of the "protocol" might be good in theory. You know what is said about theory: "In theory, there is no difference between theory and practice. In practice, there is." There's an authoritarian air to the advice. If you don't follow these exactly you are doomed type of attitude. Things are not black and white but lungs matters would want you to believe and behave otherwise. If your post is the least bit controversial or contrary to their teachings it will be deleted and sometimes the user banned. A hostile environment is not what a bronchiectasis sufferer needs.