Hardware

I'm having a remarkable (actually from gen 1 over 2 to the current version 3 now) and it's an absolute gem.

I always rely on pen and paper for my work to scribble down stuff, draw some diagrams or just take typical meeting notes.
When a paper notebook was full, I still needed it, but also had to pack a 2nd one.
Working on multiple projects made this even more complicated (read: heavy backpack full of notebooks). Now with the remarkable I can have much more structure (with folders and tags) in my notes for all projects, have the ability to move things around on the page to restructure and I can easily sync it to other devices or do a screen cast, when I quickly want to show something during meetings.

It just fits my workflow perfectly.