[dj-wonk]

I appreciate some of what you say, but:

1. I'm skeptical of a claim such as "But the actual medium doesn't matter as much as the practice you follow". I recall hearing about studies that show tactile experience (physical writing for example or being physically present during a lecture) forms better memories, at least in many people.

2. I strongly disagree that the best way to store your ideas is to memorize them. First, memorization isn't feasible, information-wise. Second, memorization is not most people's general goal. I would suggest a more general goal is to recall the salient features of your ideas and connect them to your task at hand. This suggests a mix of storage mechanisms: some memorization (i.e. for indexing, summarization, and connecting) with other higher-bandwidth, less-error-prone storages.

To prove my second point with a counterexample: I highly doubt that visual artists can remember every brush stroke on their favorite canvases. It is more important, arguably, that they organize their work in a way that they can refer to it. And, for the purposes of creating future work, I doubt that memorizing exact details of previous work is the most important. Remembering the inspiration and the techniques is probably more important.