Well, for one thing the site automatically shows what you have and haven't read by Bolding the font of threads / sections you haven't read. Here's an example
Also, when you are viewing a forum there is an option on the far left of the navigation bar to "Mark Forum Read"
Does that help? I'm happy to answer any other questions you have. I know it's a learning process but I think once you get it you'll see it's an improvement.