Effortless personal productivity (or how I learned to love my monkey mind)
There are really two concepts that I have been trying hard to master:
1. As the OP, learning to recognize the state of your mind, and picking a task that's appropriate to it
2. Learn to enter and exit the desired state of mind at will. Like switching off the lights in one room, and entering another instantly.The latter is imho harder because it requires the metacognition from the former as well as discipline. But discipline itself is not sufficient. Need to build in sufficient downtime as well and fight the urge to be productive during that phase. Let it all sink in. This might be the hardest.