Interesting post. In addition to the above I suggest the following:

5:

With regard to the mind-brain and learning, I'd do more research in neuromyths and cognitive science that way you're more confident your ways of learning are having positive effects. Here is an introduction to some neuromyths such as, we only use 10% of our brains, some of us are "left-brained"/"right-brained" etc.

I'd also think about what knowledge means and the different types of intelligence you could conceive of. For example, emotional, physical/kinetic development may help yield insights in other "domains" of knowledge, which you'd get from exploring and trying new things, as mentioned above.

6:

Revisiting concepts helps to reinforce their neural pathways in the brain. We can make connections and process more quickly if we have deep focus, which has something to do with the fatty tissue myelin which surrounds nerve cells. I think they fire more quickly and smoothly the more myelin there is.

For more on deep work/focus and deliberate practice I'd really recommend Cal Newport's Deep Work[/i], which also makes use of:
Ericsson, K.A, Krampe, R.T., & Tesch-Römer, C. (1993). The role of deliberate practice in the acquisition of expert performance. Psychological Review, 100(3), 363-406.

7:

data, collaboration and visualisation could be something worthwhile here.