I like to share something about On-page seo that how much it helps you to improve your ranking.
In On-Page seo first you have to take care about proper title of your page that your page title should relevent to your site services.
Proper meta-description and meta-keywords both play vital role in ranking of site. If your description is unique and your keyword should be relevent to your page contain.
and one more thing check that your site is rediret on same url either you are typing http://wwww or diretly domain xyz.com
If any one have more idea about Onpage please make it share with us.