Check your inbound links...

Inbound links play a large part in determining your website's rank in Google and other search engines, you can use 'Yahoo Site Explorer', use that as a search term, then simply enter your web address. You can then select to view the number of inlinks that come from outside your domain, to your site. If you have a site where there are alot of high page ranked (Google) sites, i.e. scored 4 and above, linking to you, then this will, in turn, make your site rank higher, as well as all your other optimisation activities. You can check your home page rank in google by activating the function on the Google Toolbar, it appears as a small green bar, which will say when hovered over: 'PageRank is Google's view of the importance of this page.' then the score i.e. 3/10. If you are looking to make substantial increases in your website ranking, it is unlikely you will compete with companies who have amassed a large number of relevant inbound links, so your strategy may then need to revert to less mainstream search terms that have less competition. It's great to have a look at the way your site is working and how many people are linking in, but it's a much better idea to look after the more basic functions of your business and its service levels/ quality / marketing etc, which will have a much greater bearing on your success.