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For width we go right to the edge so to speak, so 960px works great for us. Our best has been 960px wide by 480 to 550 px high.480 to 550 wide depends on how many tool bars are installed.  As a landing page we will usually go with 480px.

My feeling is that back links are important but much more important is your long tail key word.  Who is your competition based on sites that provide training and services like you do?  What is your long tail term vs theirs.  If they are a match then ding they are your competition.  Are you local or national,  look for local competitors with qualifiers in your area.  I do not know much about your subject but this site appears to be your main competitor on a national basis. http://www.nlpcoaching.com  Wikipedia is a resource search engine but not a tool for goods and services.  Ask these questions first. 1. what are my main long tail terms 2.  Does my offer or site  have a local, national or global appeal?  3. Have I added qualifyers to my search if it is local or national, such as San Diego or United States?  Build your search based on that.  NLP Traning vs. NLP Traning California.  Type that in and the top 3 who actually do what you do, are your competitors.  I hope that helps.  Use that to analyze your linkage vs. theirs.

This question is about a new file structure and SEO friendly URL's.  Does a file name make a difference? I have a direct question about file structure.  Our old site was formated with a URL of http://rousechamberlin.com/about_us.aspx  our new site is structured http://rousechamberlin.com/AboutUs/  no file no extension.  As the SEO guy of the company and not the programmer my feeling is this is killing us.  Does anybody have any thoughts on this?