I write shorthand notes in a text file using a text editor saved in a folder mounted from Drive. The first line is the subject and meeting date. Sometimes the second line is names of attendees & their initials if it's not a regular thing.

Every other line is prefixed by * , X, -, or ?.

  * Someone else agreed to do something   
  X I agreed to do something    
  - Thing to remember   
  ? Question to answer

Generally these files end up being 12-15 lines long. I don't write notes in every meeting, only external ones really.