How to EMail Users when there is a REPLY to the thread?
 

One thing I noticed is that people don't check the forums or lose track of the threads they posted on.

How do you help with this? How do you get an email sent when somebody replies to your post/thread? Thanks guys!

The member would need to subscribe to the thread. He can also set this as a default option in his UserCP settings.

In vboptions > registration options, you can set it up to automatically subscribe them to threads in the Default Registration Options.