Under the Messaging and Notification section (2nd section on that page), find the "Default Thread Subscription Mode:" option. You can choose "Through control panel only" and you'll see them in the notifications count at the very top of the screen - click Notifications to check them - or you can choose from several email choices - immediately, daily summary, weekly summary. When you start a new thread or post a reply to a thread, this is how you'll get notified of follow-on posts.