You need to do enough exercise to keep your site properly indexed with
search engine.i am providing some tricks that can help you in improving page
relevancy. as perhaps you know that only Google page rank is not important
for search engine ranking-Page relevancy also important.if you can do some
exercise than you can improve your traffic.

[1]. Your Web pages with content should be interested in reading. As content
is king for search engines content in your site should be both unique and
interesting.this can improve your impression.

[2]. Content should be highly focused with keyword phrases. rather than
phrases that are too general and competitive Specially when there is more
competition.

[3]. Optimize your Web pages for at least three to five keywords at a time
You should optimize your page for minimum three keywords-for three keywords
your page should be highly relevant.for that you need to choose better
keywords,choosing keywords is not a game of guessing.it is one science.Write
your site's content using the keywords for which users search, and you'll
literally be speaking the same language as your visitors. Useful
sites:-Nichebot.com and Wordtracker.com

[4]. Use regionally specific keywords, when applicable. if your target is
regional than try to choose keywords that are regional. Example:-you can
choose 'loans in new york' rather than just 'loan in USA' that's why you
will get highly targeted visitors and improve your visitor to sales ratio

[5]. Use the most commonly used variations of your keywords, with keyword
research Don't choose keywords that are highly competitive(specially when
your page rank is low.) You can choose their synonyms etc.as per i said you
need to do some research work for that.also consider some variation that can
occur due to typing mistake etc.

[6]. Each optimized page should contain a unique title. It will some time
meaningless if you will choose same title pages more than one.title tags are
very important and perhaps you know that searcg engine give lots of weight
to title if title of your page will different. than you can get more traffic
for more keywords.this is important.

[7].Use multiple keywords in your title tags when appropriate. Choose better
title for every page using synonyms etc..so that you will probably also get
traffic for that keywords too.but don't go overboard.

[8].Most important keywords appearing above the fold and throughout each
optimized page. First few lines are very important for search engine page
relevancy.so write that with special care and using your all main
keywords.also include your keywords in other part of page too.

[9]. Using keywords in hypertext links, whenever possible. if you will use
keywords in hypertext links than your page which you link will improve its
page relevancy automatically

[10]. Each optimized page contain a unique meta-tag description. Some search
engines still give more weight to meta tags so like title meta tag should be
different for each page if possible.

[11]. Each optimized page contain a unique meta-tag keyword list. Like meta
tags you should also change meta tags wherever possible.and that keywords
should also include in page body.

[12]. Place common misspellings of your keywords within your meta-tag
keywords. Many people using this system to get traffic you can use
misspellings in youe meta details and can drive traffic. due to typing
mistakes of searchers

[13].your graphic images should contain descriptive keywords within the
alternative text attribute, when appropriate. Google also decide relevancy
through name of icons,images etc..so try to include your keywords in it.

[14]. If you are submitting pages to non-U.S. search engines. write your
pages in the appropriate language if you will not do it.it may possible that
in international search engines your rank will down.