HI Stian,
I used the approach that @Scott_Collier-Weir mentioned in this demo doc I did for the Coda To do list evolution challenge a few months back.
In the meetings area I use a canvas column to store a meetings template. That cell is automatically populated with a meeting template when a new row is created. It has room to capture an agenda and notes, and two tables: one to store the attendees, with a button to send the minutes of the meeting to them, and another to store all the action items arising from the minutes. Elsewhere there is a view of action items that pulls together all action items from all meetings, as well as action items/ todo’s captured for any other purpose in the doc.
And here are the winning docs in the challenge:
Regards
Rambling Pete