When you log on, how do you find the posts that you read and/or comment on? I usually look at the main page, but the same posts will be listed there for hours and hours. That or I just look at posts that are in my notifications for one reason or another. It is user unfriendly enough that it is easier to just close the site and go do something else.
I just check the most "recent' of the "Discuss" page. Also my notifications and messages.