Go old school. Keep a notebook and pen ready and start jotting down points in brief. Focus more on understanding what is discussed then giving attention to writing long/ more or else your attention span will miss the later points discussed while being busy in jotting.
Also, you can use an external sound recorder (audio recording software in your mobile would do the job) to keep track of what was discussed. Just don't let anyone from your engagement know that you record. This will not work though when you go to office and use headphones while on call. Unless you hop to an empty cabin when call starts 😉