If you run a wordpress site, you can’t afford to miss the below mentioned plugins (infact some of them are/should be part of the wordpress install.
One of the beautiful aspect of WordPress is the search engine friendly structure/options that it offers. Having said that, one needs to use a SEO plugin to ensure that you get the maximum out of wordpress.
There is an ongoing debate whether AllInOneSEO is better than Platinum SEO Pack (offers few more features), so feel free to take a pick. Whatever you do, ensure that you use one of the above mentioned plugins.
Google XML Sitemap
This plugin will generate a XML sitemap which will help search engines like Google, Bing, Yahoo and Ask.com to better index your blog. With such a sitemap, it’s much easier for the crawlers to see the complete structure of your site and retrieve it more efficiently. The plugin supports all kinds of WordPress generated pages as well as custom URLs. Additionally it notifies all major search engines every time you create a post about the new content.
Get Recent Comments
While WordPress has a ‘Recent Comments’ widget, you would still need better control in handing comments section (especially if reader engagement is one parameter you measure your blog on).
The plugin lets you customize your comment section – for example, the number of comments, the length of the excerpts up to the html layout. You can let the plugin order the comments by the corresponding post, or simply order them by date. The plugin can (optionally) separate the trackbacks/pingbacks from the comments. It can ignore comments to certain categories, and it offers support for gravatars. It only gives extra work to the database, when actually a new comment arrived. You can filter out unwanted pingbacks, which originate from your own blog.
WordPress is bad with Database optimization and you need to optimize your DB at a regular interval. This plugn allows you to optimize database, repair database, backup database, restore database, delete backup database , drop/empty tables and run selected queries. Supports automatic scheduling of backing up and optimizing of database.
Subscribe To Comments
Your readers leave comments on your blog, but is there a mechanism to reach back to them? This simple plugin helps increase the reader engagement by allowing them to subscribe to comments.
The plugin enables commenters to sign up for e-mail notification of subsequent entries. The plugin includes a full-featured subscription manager that your commenters can use to unsubscribe to certain posts, block all notifications, or even change their notification e-mail address!
There are tons of bookmarking service (share this/Add this) and if you aren’t the type who wants to play with wordpress’ php files, these plugins will serve the purpose: ShareThis, AddThis, Add To Any or Sociable.
We compiled the list of useful Twitter plugins here: Twitter Plugins for WordPress [The Complete List]