One of the most popular plugins for Wordpress is the All in One SEO pack by Semper Fi Web Design. Appropriate to its name, this plugin handles all of the nitty gritty details of SEO for those of you who don’t have the time - or the money - to improve the crawlability and ranking of your site.

Remember, despite its moniker, the All in One SEO pack still requires a bit of strategic thinking on your own part. You’ll still need to input a custom title and meta description for the home page (which is essential), and you should also exert control over the plugin options, when necessary (for example, some posts will require you to input a custom permalink that’s separate from the default permalink; this is vital for proper indexing in some cases).

The All in One SEO pack works flawlessly, and you’ll find that it’s quite intuitive.

In addition to its full range of options for title formats (for tags, archives, search titles, and more - even), you’ll find that the plugin gives you the ability to auto-generate meta descriptions, use NOINDEX for sections that pose a duplicate content issue, and provide custom titles, descriptions, and meta information for individual posts - if you so desire.

This is, by far, the best plugin for SEO I’ve seen out there, and I highly recommend adding it to your Wordpress install.

Each Week, we’ll review a popular open source plugin - whether it’s the latest add-on for Mozilla, or some sweet little bell (or whistle) for Wordpress.

Thanks to a post seen on Matt Cutt’s blog, we’ve been taking a look at Mitcho’s “Yet Another Related Posts Plugin.” The thing is: It’s not “yet another” plugin. This little powerhouse has a plethora of interesting features.

My favorite option was the ability for admins to view the ‘relatedness’ score of the posts. I’ve always wondered how these little gizmos score the posts. Much like the mysterious Google algorithm, I’m sure they take a variety of factors into consideration, but as far as I can tell YARRP looks more closely at the title and body text using a SQL query keyword analysis.

Of course, another reason I love this plugin is the fact that you can alter the algorithm yourself! You have the power of Google at your fingertips! Don’t like the way posts are scored? Simply disallow tags or categories in the YARRP scoring algorithm!

Not fond of the total number of posts being displayed (heck, if you like to produce a lot of content, your related posts could start to get multitudinous!) No problem! YARRP allows you to select the total number of posts to be displayed.

You can also place the related posts box anywhere in your Wordpress template. This is invaluable if you prefer to have your related posts displayed as a floating div in your post, or even in the sidebar.

Overall, upon testing the plugin on my own experimental blog, I’m having great results. There is a heated debate in SEO circles whether or not interlinking will help you SEO-wise, but I’m sure it couldn’t hurt, and I’ve personally seen well-placed related links bring me up in the rankings.