After my migration from b2evolution, one of the first “install-and-forget” things to do is to install the Akismet plugin for WordPress.
Akismet eliminates comment- and trackback-spam on your blog and once you have installed the plugin and requested an API key, you almost forget that Akismet is around.
The plugin provides a dashboard which lists detected spam and also integrates into the commenting and track-back system of WordPress:
