For note taking, I generally stick to first writing things down on paper, then copying them to OneNote later. I figure this gives me the best of both worlds, I get the better retention from handwriting, get to review my notes as I copy them, and get the notes in a format I can always access.

Organization, though... Man, no matter how hard I try, I just can't stick to any organization system, paper or digital. I wanted to bullet journal, I really did, but I have notebooks worth of failed organizing attempts. It's sad.