I went from paper to a tablet for a year (as a challenge), ended up back on paper. My boss got me into using nicer notebooks, and I've been doing it for years (about 6). I then switched to MD files, eventually ending up using Stackedit extensively for a while similar to the tablet effort. Now, between work, hobbies, being a DM; I've given up and spent some time in One Note... and now that's where I've migrated everything. I'm always interested in how others do this in case they've figured something out. I still use a paper notebook as a personal journal, important notes, etc. I also still use a notepad for those daily notes / thinking on paper that you can throw away at the end of the day.