Over on CSS-Tricks, I describe a problem I had of trying to create an RSS feed of pages that were buried two deep under a parent page. The standard query_posts can't go two levels deep with pages, or accept multiple parent pages to run the query. Instead I had to create multiple feeds from a custom template and stitch them together.
Web developer and WordPress enthusiast Peter Wilson explains an improved method for including WordPress’
Nathan Rice shares an clever technique to serve your IE6 visitors the Default WordPress theme (or any theme, for that matter). He even wraps it all up into a nice plugin that you can use for your site. I think this is a good middle-ground between completely ignoring IE6 and breaking your back trying to accommodate it. You could even design an "all-purpose" theme for IE6 to streamline new site development. Drag, drop and done.
Use the WP-DB-Backup Plugin, have it send a copy to your email. This is what we do on DiW and it works great. Part of security is having clean and recent copies of your data in case of failure.
Update: (404 link removed 2014/04/18)
WordPress is like Windows, it's a huge target so hackers are extra-motivated to exploit it.There has been a bunch of brew-ha-ha over WordPress security over the last week or so. It started off a few weeks ago with a really easy URL hack to reset the Admin's password. That ballooned into a far nastier exploit allowing a new admin to be created who could totally hose a site. Matt Mullenweg does a little damage control here by essentially saying the best way to stay secure is to stay updated to the latest version. I wholeheartedly agree, and think that that step is just a part of a complete security breakfast (the upcoming book will have lots on security). I have probably nearly 20 WordPress sites I maintain and every single one of them was at 2.8.4. It's so trivially easy to upgrade, It's a no-brainer.
WordPress is a CMS out of the box, but sites that are really deep in page templates and hierarchies can benefit from some help on the back end for managing them all. This roundup of plugins do just that.
Note: link removed 2013/04/21 —
This looks promising. Runs MySQL Fulltext search, as well as integration with Google Custom Search Engine.
On the search results page you can refine your search by specifying whether to search posts, pages, and comments. You can also sort the results by relevance, date, or alphabet. The Advanced Search link leads to a form where you can specify author, categories, tags, and date range.
I haven't tested it yet though, so I can't officially vouche for it, but I'm really looking forward to playing with it. Built in WordPress search has sucked too hard for too long.
Smashing Magazine with a characteristically nice set of tricks for WordPress, this time revolving around hooks. You can attach your own functions to hooks in that funny file functions.php that everyone is raving about. Neat ideas including entering default text directly into the TinyMCE Editor, and putting entire Post contents into a PHP variable.
Remember though that functions.php is theme-specific, so in my opinion should be used for things that are specific to a given theme, while content and admin things should be left to plugins.
We’re happy to announce that Digging into WordPress is now featured at Ozh’ Planet WordPress! Planet WordPress is an incredible WordPress resource, bringing together some of the Web’s finest WordPress contributors, plugin developers, and theme designers. The Planet WordPress feed currently features nearly 50 hand-selected WordPress bloggers and aggregates their syndicated content every two hours. As proclaimed at the site, Planet WordPress is “The Epicenter of Everything WordPress” — definitely a great way to stay current with the wonderful world of WordPress.
By default, all your Posts and Pages save revisions of themselves as you are writing them and editing them. This can really save your butt if you accidentally change or delete something you shouldn't have and have no other copy. This is a quick overview of how to use this powerful feature of WordPress.
Update: (404 link removed 2014/10/22)