It’s down to whatever works for you. I find I memorise concepts well when there’s some kind of physicality to them, and I’ve therefore repeatedly gone for the

It’s down to whatever works for you. I find I memorise concepts well when there’s some kind of physicality to them, and I’ve therefore repeatedly gone for the “serial killer wall” method of note taking - in my case, it tends to be multiple A4 sheets with handwritten notes or printed reference sheets plastered on every visible surface around my workspace, using cork pinboards for more space, with an arrangement of information that makes sense to me - I like a four coloured biro for splitting out either dimensions or topics of information, and sharpie or string to link disconnected areas together. This translates well for digital applications, like coding and electronic engineering, physical applications, and more abstract learning efforts, like cramming a masters in physics, or learning a language. Yes, you can replicate this with a wiki or hyperlinked whatever, and I sometimes do for pocket guides, but being able to fetch information at a glance is key to making that recall just happen without looking, for me. The structuring of the notes takes an effort in understanding, in creating a landscape of interconnected information - and the structure of the notes becomes the physical representation of the structure of the information framework. I then, later, when referring to some part of some knowledge acquired this way, find my mind’s eye using that same structure to identify the relevant information. Anyway. It really is whatever works for you, and trial and error will get you there - for me, it’s paper, pen, and somewhere to put it all.