Following.
I still have no idea of how to set this up and do this. It'd be neat but I'm not that smart......
The software used on these boards does not allow "subscribing" or "following" threads per se, but once you've posted in a thread, you can click on "Show new replies to your posts" and it will only show threads you've posted in. That's why you'll often see posts like "Following." early in a thread.
If you click the notify button, it does subscribe to the thread, and then those threads show up on your profile page under notifications, along with options for email notification.
I can't say I've ever once used the "show new replies" button. I'm on the forum far too often to need it.