You now add Action Items ('Tasks') within the context of the Agenda Item you're discussing, or in the Action Items section of a meeting template. You add tasks to a meeting note by clicking on the '+' icon next to any item, or using the hotkey '/t'.
All your tasks from all your meetings will appear on your Tasks list with a link back to the meeting notes. See below for screen shots.
Adding a task using the '+' icon:
which will reveal a menu of item types:
Adding a task using the /: