Instead of optimising your page, try to get more quality inbound links. try to get some good blogger to review your site or product and ask them to link to your site. Remember that a link in the content is more valuable than a link on the blogroll.Regarding the keyword optimisation, you can try to write more content on that particular topic. If your site is a blog, try to write a blog series about the topic. For eg: your post may be about various operating systems, then you can write a blog series about the different OSs available. About 4-7 posts would do. Also try to publiscise your site in variious media like forum, chat, mail, friends, etc. Word of mouth will get more links from people.