How do I favorite/watch a topic?

To favorite or watch a topic, go to the desired topic and look above the first post. In line with the New Topic/Reply buttons, only across the page on the right side you should see the word "Actions." Click it, then in the resulting menu click "Favorite" to add the topic to your favorites, or "Topic Being Watched" to watch the topic, IE get notifications of new posts to it. Watched/Favorited topics can be edited by going to the "Profile" tab in the navbar, then the "Favourites" or "Topics Being Watched" tab, depending on which you'd like to edit.