I recommend the plugins:

1. Stop Comment Spam and Trackback Spam Akismet

2. All In One SEO Pack WordPress Plugin | WordPress Developer

3. Bad Behavior / Bad Behaviour:

4. Sitemap Generator Plugin for Wordpress Dagon Design

5. Do Follow Plugin For WordPress

6. Follow Me | Ignite Social Media

7. Google (XML) Sitemaps Generator for WordPress

8. WordPress › http:BL WordPress Plugin WordPress Plugins

9. Wordpress Plugin - My Page Order | Geeky Weekly

10. WordPress-Ready Contact Form v.2.0WP - Beast-Blog.com

11. Dave’s Blog Spam Karma 2.3

12. Tell-a-Friend: Word of Mouth Marketing made simple

13. Tracked RSS | Jack McIntyre

14. WordPress Firewall Plugin » SEO Egghead

15. WP Security Scan | WordPress Developer

16. WordPress Super Cache

17. WPtouch: Mobile Plugin + Theme for WordPress ? BraveNewCode Inc.


And don't forget to implement this:
Important Security Fix for WordPress ? Perishable Press

If you are a bit more technical, then go ahead and do this too: http://tdot-blog.com/wordpress/6-sim...x-in-wordpress

I am sure that with all above you will have such results that you will be very thankful.

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"Being an expert isn't telling other people what you know. It's understanding what questions to ask, and flexibly applying your knowledge to the specific situation at hand. Being an expert means providing sensible, highly contextual direction." Jeff Atwood
SEO Workers - Search Engine Optimization Consulting Company | SEO Analysis Tool | Webnauts Net SEO