I'm a fan of graph paper for note taking myself. Also, I'm a much bigger fan of mechanical pencils over pens. My favorite mechanical pencil is the Pentel Side

I'm a fan of graph paper for note taking myself. Also, I'm a much bigger fan of mechanical pencils over pens. My favorite mechanical pencil is the Pentel Side FX. It has extra eraser compared to others and the button for extending the lead is on the side, which is more convenient.