You and your friends can then add or "post" to the discussion at any time by using the "Comment" button. Comments are appended in the order they were made, and each comment is identified by the author's user name and the time and date. In order for your friends to leave comments on your Discussion, the Discussion will need to be shared with. You can add friends to your Discussion by adding them to the Discussion Share Control. Follow the steps in the image below:

Once you have shared your Discussion, your friends will find Notifications in their Dashboard whenever there are new comments in the Discussion, and they can click right through from their Dashboard and be taken instantly to the Discussion. Once in that Discussion, they can add a comment to your Discussion by following the steps below: