As Alex mentioned, there are many ways to work with it. You have a variety of tools to help, such as tags, people tags, and reminders.
Here is one possible way of approaching it: In the meeting, you get down notes as quickly as possible. Things you need to address after the meeting, you mark in some way, such as with a special tag, or something like a star (#star). You can also add people tags in the text if something relates to a particular person, and have special tags such as #action or #followup and add these where appropriate. You might also add a reminder, which will be used to make sure you don’t forget to go through the notes and clean them up.
Later, when your reminder fires, you go through, clean up the tags, and perhaps add new ones. You can setup saved searches for the tags to track if there is still stuff that needs doing. Eg. You could apply an extra tag #open to anything that still needs doing, and remove that tag when the task is done. That way your saved search will track what is still open and needs attention.
It’s also a good idea to make a new note for the next meeting as soon as the last one finishes, and start filling it with stuff you think of for the next meeting during the week. Alex wrote a post about how Agenda came about, and it was guided by this type of usage. The Next Box™ – The story of how Agenda came about