When updating a web page, you should retain the same page name and just upload and overwrite the old one. If it's a totally NEW page and must have a new name, but the old page is relevant, then you should use a redirect from old page to new one.
SEO Tools:
Web Page Analyzer - 0.98 - from Website Optimization: http://www.websiteoptimization.com/services/analyze/
Free SEO Services. Search Engine Optimization Tools: http://www.seomastering.com/?PHPSESSID=0939fdd6f25d4fdf36ed71fa75def667
Top 15 SEO Blogs To Follow If You Want To Brush Up Your SEO Knowledge: http://www.webdesignbooth.com/seo-blogs-to-follow-to-brush-up-seo-knowledge/
6 Ways to Get Your Website Noticed by Mainstream Media: http://www.webdesignbooth.com/get-your-website-noticed-by-mainstream-media/
Google Search Engine Optimization Starter Guide: http://static.googleusercontent.com/external_content/untrusted_dlcp/www.google.com/en/us/webmasters/docs/search-engine-optimization-starter-guide.pdf
Google Webmaster Tools: http://www.google.com/webmasters/tools/
Search engine submission: http://en.wikipedia.org/wiki/Google_Sitemaps#Search_engine_submission
Search Engine Optimization (SEO - Getting Started): http://www.htmlgoodies.com/beyond/webmaster/toolbox/article.php/3828801
http://seo.alleycode.com/freetools.htm
http://www.websiteoptimization.com/services/analyze/
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