Here are some plugins you may want to consider installing on your wordpress blog:
Akismet – gets rid of spam comments so they don’t fill up your blog; it helps keep your blog clean.
Broken Links Remover – scans the links on your website and list the ones that are broken, so you can fix them.
All in One SEO Pack – a plugin that will take care of optimizing the webpage for you and make it search engine friendly, all you have to do is fill out the fields in the plugin and you’re good to go.
Cbnet Ping Optimizer – ‘pings’ the search engines every time you make a new post or an update… this can save you time on boring repetitive tasks so you can focus on important things and be more productive.
CommentLuv – a plugin if you want to increase comments.
Secure Contact Form – gives your readers a fast and easy way to contact you directly to your inbox, and avoid messages from spambots.