If you have a Wordpress site or a blog, try this. Go to Plugins>Add New and search for SEO. I just did this and got no less than 33 plugins. Obviously, the basic Wordpress setup doesn't have much in the way of SEO freedom, so you're going to want to add a plugin. I've tried Platinum SEO, All in One SEO and a few others, but I recently stumbled upon Headspace2 and it has some unique features that make it a true contender for Wordpress SEO plugin supremacy.
Let's take a look:
Right away I was impressed with the tool's aggregate ability to edit pages without having to load individual pages to edit. Want to edit your page titles for your category pages or search result pages? Not a problem, just go to the page settings and click on the pages you want to edit and quickly blow through your pages. VERY streamlined. Even better are the page modules. These allow you to reach into a whole new level of customization.
The most interesting one of these to me is the "Page-specific Plugins". So perhaps you want to add a social media plugin like Digg Digg on some pages, but not all of them - that's a snap with Page-specific Plugins. This is still new to me, but I imagine the possibilities are almost limitless if you put your mind to it. Headspace2 also has site modules which are also incredibly handy for easily setting up site wide modules for Google Webmaster Tools, Google Analytics, CrazyEgg and other useful intelligence packages and functions. I have yet to test some of these (and some are out of date and not supported, R.I.P. 103bees) but the capabilities contained here should allow you to do away with a multitude of other plugins that are clogging up your dashboard. Getting started is also pretty easy if you've been using another plugin, simply import your settings and you can make a seamless transition.
No doubt about it, Headspace2 is a flat out SEO monster of a plugin. If you're looking to make wholesale SEO changes to your blog or site, Headspace2 makes it easy to do so, and adds in a handful of other functionalities that extend beyond the realm of SEO in terms of customization. If you want more info on this plugin, check out http://urbangiraffe.com/plugins/headspace2/ for more details.