This feature is pretty cool but is a little tricky to figure out the first time. Below the "Forums" tab select "Watched Threads". It will display the threads that you selected "Watch Thread" BUT it will only display the threads with new posts you haven't seen yet. To get a list of all the threads you "watched" and participated in select "Show All Watched Threads" The whole list will display. This is a great way to go back and review threads you are looking for again.