80% of the value of notes is the act of writing them down by hand. (I don't have a citation for it, but I tend to believe it). That is notes are primarily a tool to help you not fall asleep, start daydreaming, or whatever distraction keeps you from listening.
The fact that you cannot write everything down forces you to think about what you are hearing and find the important part to write down. Now that you have found the important part the writing helps you remember it.
When you are done with the above throw your notes in the recycling... Note that the above system works for me because I can't read my own writing anyway. (Probably a case of dysgraphia but I've never been formally diagnosed)
The fact that you cannot write everything down forces you to think about what you are hearing and find the important part to write down. Now that you have found the important part the writing helps you remember it.
When you are done with the above throw your notes in the recycling... Note that the above system works for me because I can't read my own writing anyway. (Probably a case of dysgraphia but I've never been formally diagnosed)