You have the option to watch any thread you like and also to receive emails when there are new posts in that thread. To do this go to the thread you want to watch and click on "Watch Thread" in the top right of the thread. You will get a pop up asking if you want to receive email notifications if someone posts in that thread from now onwards. To view all your watched threads just simply go to the Hub Page and click on "Watched Threads" under the Hub tab. This will take you to a page that will show your watched threads if they have new posts in them. To view that thread just click on it.