For the new people having a hard time navigating and keeping up with new post in threads:
If you click on the check mark notated by the arrow in the picture below, it will take you to the the newest post you haven't read yet in that thread. Example, I'm reading post 55, I log off and two days later I want to go back to read where I left off but cannot recall and don't want to fish around looking. Two ways you can do this one is by clicking the check mark in picture below...or you can click on your name, click on statistic tabs, find all post by (your name) and then you can click on the post you last posted.