Awesome, may I ask what you named your different tabs?
Well, most of the tabs have their names right there for you to see, but they've changed a bit since I last posted them so I'll give a general rundown of my personal organization structure really quickly:
I have the "General Tips" folder as the first thing I see, which is where most of my quick-entry pages go (things that come to mind during walks or at the gym, ideas for DJ transitions, and other stuff that I'm probably entering on my phone without paying too much attention to grammar. Then I have a few section group pages: Notes, Work, and Miscellaneous.
Notes are where I ended up putting all of those masterclass sessions and methodology videos, divided up into sections based on what they're from: EDMProd.com tutorials, Ill Gates methodology workshop, youtube video notes, and my own personal notes from reading various manuals.
Work is where anything involved in music production goes - liner notes for songs, ideas for new tracks, organization for EPs and whatnot, and anything that is meant primarily as a personal reference and idea platform.
Misc is just anything that doesn't get thrown into the other two sections - my ideas for practice regiments, for example.