the most recently entered channel/s or important news and updates will appear on the main page in the center column. i try to keep special deals at the top while they are relevant so read a post or two back for the latest channels.
on the right side of the page is a list of filterable tags. like "paid" "free" "cheap" or by "movies" "tv" "classics" "education" "comedy" etc.
when you want to go back a page, click "Older Posts" where it appears just under the last post of the page, on the right
the channel entry will include any known codes, links to add it and/or tell you whether it's in the channel store (public channels)