On the default Responsive Blue there, there are buttons at the top labeled "New Posts" and "New Threads." Those take you to all the new posts or threads posted since your last login.

You can also subscribe to threads you've posted to, and then your profile dashboard page will show you all those threads when new posts have been made to them:

https://psychcentralforums.com/usercp.php

I believe the default behavior for accounts is to subscribe to threads you post to. You can change that behavior here:

https://psychcentralforums.com/profi...do=editoptions

Under Messaging & Notification > Default Thread Subscription Mode.