Did you know you can subscribe to topics or entire boards and have emails sent to you when there are new posts made?

Look for the "notify" button in the upper-right, above a post or list of thread titles, and click on it to subscribe!

It looks like this:

Also, you can click on "Additional Options" when you are writing a post and then check the "Notify me of replies" box (but this is only good when you're the author of the post).