Good morning, Ling -
Here is my daily routine:
Inhaler first thing in AM with my morning meds and a small bite of breakfast. Meds include 600mg of long-acting guaifenesin (Mucinex) and 600 mg NAC.
30-45 minutes of gentle yoga, or stretching & a brisk 15 minute walk - depending on weather and day of the week.
Deep breathing 3-4 minutes then airway clearance with Aerobika for 10 cycles or until nothing more comes. 1-2 times a week 7% saline before this, or if I am feeling tight or congested. (I used to use every day, but find I don't need that often now unless I have a respiratory bug or an asthma attack.)
Later in the day, another short brisk walk or 15-20 minutes of vigorous house or yard work, then maybe Aerobika again. (Sometime just the exertion is enough and I can cough stuff up.) I usually do this session leaning over from the waist and more junk comes out. My friends are used to me interrupting outings to cough for 5-6 minutes.
Bedtime - my inhaler again and evening meds, again including guaifenesin and Mucinex. Then 3-4 minutes of deep relaxation breathing when I lie down in bed. This will bring on coughing of there is more mucus to get up, so I sit on side of bed and huff cough until it clears. This helps me sleep through the night.

So, you can see each of my sessions is short but targeted, and I have figure out how to fit into my day with minimum disruption.
Sue