Within the lessons that I teach, I frequently observe the same kinds of things that students seem to do a lot when they’re trying out new licks or ideas. A lot of the time they will attempt the idea, get stuck at a particular part of it, and then try again only to repeat exactly the same mistake. Perseverance once more and determination will drive them to make another attempt, but yet again, the passage grinds to a halt at the same place. I still have similar experiences myself when I try out certain new things, although I take a very different approach to these situations now than I once did. At the point where a student has made the same mistake (or just ground to a halt) 3 or 4 times, I ask them to stop.
It is at this point that an awareness of one of the key components of practice needs to be recognized and responded to. Practice is essentially made of two key components. These are assimilation and reinforcement. Assimilation is the process of learning new ideas. Reinforcement is the process of maintaining and strengthening those ideas.