Use a non-country coded top level domain... non-ccTLD domain (i.e. .com, .net, .org, etc.) Host your site in the US Get backlinks from other sites targeting the Google.com view of Google's index... As the previous poster said, set the Geo Targeting preference for your site in Google's Webmaster Tools All of the above will help.
create mata tags on USA like your site keyword is seo services so target on USA base seo services usa so u can create mata tags that time use usa word in title, description and keywords 2 or 3 time and start all SEM activities means off pages activities on USA list
First set Geo Targeting in webmaster tool and start SEM according USA and submit your site in USA Craig list sites, yellow pages, create profiles on bookmark sites with USA address. and publish press-release.
In Google Webmaster Tools you can choose Settings and then Geographic target to point the country. If you want to see your listing in the us find a us proxy. Those are not hard to find there are lots of free lists. You may have to go through a few before you find one that works.If you are talking about how to rank in us all you need is more links and anchor text.