First, don't forget that getting the top spot for a keyword is not easy
. Create long term success even as you climb the ladder by continuing to maintain your site with SEO. Optimize your site often and watch your ranking as it soars. In order to stay ahead of the game and up on top of the rankings you must pay close attention to your competition.
Don't make the mistake of spreading your content across different domain names. Avoid using additional domain names except when specifically necessary. Dominating the first page is not accomplished by creating alot of domain names. A better ranking on your main domain is a more complete concept. Doing this will make your site a priority in seekers minds.
So using excessive domains or sub-domains isn't that effective on the long run. Knowing the in's and out's of search engines will help you achieve success with SEO.