You have used google as URL submission - thats good enough. Now you should try other Social Bookmarking site to get your website on top page. Keywords - you have to use very specific keywords related to your site and the keyword density in your website must be more than 25% to get huge traffic, basically 4 - 5% is enough for ordinary websites. Thats all, friend.
Use the keyword that bests describe and suites the content of your site the term commonly known internet world as the niche.