As the second article recommended I'm adding a link to KillaBeez's
in which I was impressed by the high quality of annotation on the move list. Also please note the central control in the opening, and as I see it; the game was practically over when white got an important central outpost on the 30th move.
The third of articles recommended is actually a series of blog posts by Waldemar called
Part I: Getting The Lay Of The Land
I've noticed quite many of our members have interest in opening repertoire. This serie of articles offers some very useful tips how to build one and then again how to live with it.
Thank you for these little gems jimthemagic. I think that building a repertoire is indeed a necessary part of progressing in chess. I have chose the Sicilian Najdorf and Shevenigan as black and QG for white for about the last year and still have not scratched the surface in understanding the whole array of tactical concepts that develop from these positions, but I am winning more often with them.
a repertoire is indeedee important. I am still relatively new to chess, I've been playing seriously for about 8 months now. I am beginning to interest myself in understanding opening lines more now. I am usually a d4 player, and my response is King's Indian Defense. Over the past few days I have been playing !. Nf2 and 1. e4 a little. I respond with the Sicilian. Mostly the classical variation, but sometimes the Pelikan and Dragon. I am still being inventive and trying out new ideas. My chess is truly warped! I realise that now a lot of my MANY MANY losses come from inferior undersetanding of the endgame:- I lose drawn AND won positions. That is my Achilles heel, and I'm working on it to the best of my ability. A repertiore is important, particularly one THAT MATCHES YOUR STYLE OF PLAY!
An article I would recommend is
Thank you supergamer for that recommendation - I did enjoy it indeed. Some of the comments are funny too.
@ knightLite and killthequeen;
While slowly building up my repertoire I'll try to add Scandinavian and King's Indian Defences as black. Just bought a book by John Nunn & Graham Burgess: The Main Line King's Indian. To study it properly will take several years. To learn some basics I joined a Chess.com Thematic Tournament (King's Indian).
King's Indian Defense is my favourite line against 1. d4. If you are intrigued by the idea of letting white build up his nice 3/4 pawn centre, then tearing it apart, KID is for you!
A recommendable post from another group concerning opening principles:
http://www.chess.com/groups/forumview/opening-principles
This recommendation is an example of importance of blitz game analysis. Quite a spectacular game as well with a fine annotation.
Successful sacrifices are beautiful. Never seen one like this.
Thanks for promoting my game. 
I spent the longest time that I have on a move trying to find mate. There are positions where you can just feel that you are closing in but you just need to study every option.
As an article recommended I'd now like to add Avishka's fine collection of tips how to play better chess in form of a blog post.
Deep and meaningful indeed...
Sorry that I haven't been able to contribute much, I will try and find some articles but I haven't seen many. If you are interested in new and exciting openings, a few weeks ago I created a "Halloween Gambit" forum topic in this group and there are some good articles in there
Here is exciting news for fans of Kasparov and Karpov and the video is quite interesting too;
http://www.chess.com/news/kasparov-versus-karpov-rematch-7818
Knowledge of Time Management won't hurt even in correspondance chess. Here is a fresh article of it by Mr Silman.
There are several ways to do a post game analysis and here is Joshua's five steps' one.
I read it as well. It is interesting, but unfortunately he makes it sound easier than it is. 
In the series of Old Masters by GM Julio Becerra was recently quite game; Pillsbury vs. Tarrasch 1895:
http://www.chess.com/article/view/the-brooklyn-gunman-harry-n-pillsbury
Some more games of this master, Harry Nelson Pillsbury, are available at
http://www.chessgames.com/perl/chessplayer?pid=10506
I'd like to start Articles Recommended topic by one of energia's article called What to do with a pawn center?, which was published on Chess.com yesterday (07/03/2009). This article has a lot to do with central command and shows some complex pawn structures from top class games with high informative value.