I post and then I'm too lazy to check most threads.
Would be nice to have a bookmark system that tells you where you left off at.
As far as I know, it does (I just learned this the other day while reading the User2User Tech forum.)
First, subscribe to the thread by 1. posting or 2. go to "Thread Tools" and choose "Subscribe" in order to sub to the thread without posting.
To check on the activity of all your subbed threads, hit "Settings" a the top of the page, and all your subscribed threads are shown. Then you can either:
1. Hit the "sideways" blue arrows at the END of the thread title to take you to the last post in the thread, or
2. Hit the "facing down" blue arrows that the BEGINNING of the thread title, which will take you to the newest post after you left off.
I didn't know this last little trick until this past week. If I remember right, the system used to show different colored boxes for posts that you'd already read vs. those that were unread, but this little tip comes in pretty handy.