SEO slugs
Since the major search engines usually disregard small words such as "a", "in", and "the" when returning search results, you can match the search engine's version of your keywords better by leaving these small words out of your post URL. This plugin automatically strips these small words from your slug whenever you publish a new Post so that the post URL is more search engine friendly. This plugin can be downloaded from http://wordpress.org/extend/plugins/seo-slugs/.