As far as I can tell, project management is basically emailing people a list of things to do and then watching them not do those things.
No, first you have a meeting in which you talk about the things that need to be done.
The e-mail then summarizes the list of "action items".
Then, after you watch those items not get done, you send a follow up e-mail, restating the action items.
Then, at the next status meeting, you mention which items have, and have not, gotten done.
Items not done get put on the "action items" list....
...There is no theoretical upper limit to the length of the "action items" list....