Login, then go to My Account/Preferences and check the box beside:
Notify by e-mail when you receive a private message
You'll get an e-mail notifying you anytime someone posts to a topic you've posted in and you won't have to keep checking back to see if someone's replied.
You can also receive e-mail notifications when replies are posted to topics you didn't post in. If a topic interests you, just click on the Watch Topic button under the topic posts.
Should you ever wish to stop receiving e-mail notifications of replies posted to a topic, simply click on the Unwatch Topic button. This will work whether you posted under the topic yourself, or clicked on the Watch Topic button.
____________________ I have no idea what your talking about!