Mainly internal noise distracts me. If I'm not focused on the speaker and in my own world, I tend to get lost in my thoughts and forget the goal. External noises that distract me are anything related to phones and sometimes can be something like temperature. I try to redirect myself, but when that fails, I tend to start taking notes or draw because it helps me concentrate.
I completely understand this! I also love the method you chose.
I also tend to doodle if I'm having trouble listening, and sometimes it helps, but usually I get more distracted.
The tactic of taking notes or drawing is a great idea! It's an easy and great way to get back on track.