Ady's link takes you to the list of most recent threads, which is a good start. However, you probably want to select how an individual thread opens as well, either with the first post (the oldest), or with its most recent.
When you are logged in, try clicking top-left Settings->My Account. That should give you Website Preferences and allow you to change the default thread start behaviour.
By the way, you can't win. If you start with the earliest post you have to wade through the whole correspondence. (As 'What did you do today' is up to 48 pages by May, this may take some time!) If you start with the most recent post, you risk making a fool of yourself by repeating a point that's already been made. Extra embarrassing when you find you repeated a gaff thoroughly debunked by another 20 posts you hadn't read either. Don't ask how I know…)
Dave