To save a discussion, simply 'Star' it. To star a discussion, click the star next to the discussion title. The gray star will turn yellow to indicate that you have starred this item. To access your 'starred' discussions at a later date, simply login to http://RealTown.com/Community and click the 'Starred Items' button from your Community Menu.
You will notice in the Starred Items area that there is a box checked for Watching, meaning that you will be sent an e-mail message when there is further activity in your "watched" thread.