Here’s a really cool thing I came across (and don’t remember if I had mentioned this before, but won’t be bothered to check): former Trek wonderboy Wil Wheaton reviews classic episodes of his old show, Star Trek: The Next Generation. They’re pretty good reads and offer decent insights into the shows from a guy who’s been there.
(2019 Update: The link to the site is long dead. However, Wil Wheaton did compiled the few reviews from that old site and turned it into a book called Memories Of The Future. Check it out; it’s a pretty good read.)