Never try to optimize your Site befooling the Search Engines

Using invisible text is something that can get you banned from a search engine. The main purpose of search engine optimization is to give your website the best possible chance to come up in good positions when someone makes a query for your keywords or key phrases. The key to doing this is to design web pages and write copy that is intelligible to search engines, without sacrificing the experience and understanding of your end-users, the people who visit your site. So, don’t try to trick the search engines.

Use Text instead Images wherever possible

Many designers want the site to look good and replace headers with gif images. The headers are one of the most important elements on any printed page. If you want to know what a magazine article is all about, then you just have to glance at the headline and the sub-headings to get a good idea. Similarly, search engines place great importance on headers. If you are selling Mobiles and want to be found in the search engines by people who make the query “Mobiles” then you should put these words in a text headline, properly marked, at the top of your page.
Some website building programs often render entire paragraphs of text as images. A person viewing such a page will be able to read it, but a search engine’s robot will not see the text.
So, check your web pages, and if vital text is being replaced by graphic images, then it is better to substitute the images with text. Don't put the same title tags on all the pages. Title tags are even more important than headlines in letting the search engines understand what your web page is all about. The title tag is displayed as the first line of text in the blue row at the top of the browsing window.
Normally you will want your site to rank well for a variety of phrases and keywords. You can’t stuff all of these keywords and search phrases in one headline or in one title tag. It will cause "indigestion" for both your viewers and for the search engines. A better strategy is to organize your website into different pages, with each page emphasizing a certain aspect of your activity.
In fact, most websites are built this way. But the problem is that instead of emphasizing the unique aspect of each particular page with a properly crafted title tag, many websites repeat the same tag on all the inner pages. This is truly a missed opportunity to get ranking for a large number of different keyword phrases. So, don’t miss this one: make a separate title tag for each of your pages.

Use your site’s “anchor” text to your advantage

Just as the title tags and headlines give a good indication about the contents of your pages, so do the descriptive words in the internal links on your website. The clickable portion of a site’s text links are known as "anchor text". Instead of having all of your anchor text read “Click Here,” find a way to put the words "mp3 Player", "Indian Dating", "Sydney Real Estate"or whatever your keywords are in the text links of your site.
Once again this works to the advantage of your readers as well as giving the search engines better information about the contents of your pages. The more descriptive your text links are, the better they are for your users. In fact, one of the best methods of site navigation is to refer to the relevant pages of your site from within the text on your page, linking to them using descriptive keywords.

Use keywords in your file names

Instead of naming your files as if they didn’t matter, such as page1.html, page2.html, put your keywords and keyword phrases in your file names. If you do a search on Google for any particular item you will see that wherever your search keyword appears it is listed in the Google results in bold text. Usually you will see this bold text in the title that is displayed, and in the descriptive text that Google displays underneath the title. You will also see it in the url. If your site already has some of your keywords in your main url then that is helpful. But even if it doesn’t you can still have file names such as www.xyzwcompany/m3players.html etc.
Do the keywords have to be separated by hyphens? Once again if you look at Google results you will see keywords in file names are displayed as bold text even if they are part of a longer stream of text. This is a process known as stemming, where the search engine can recognize keywords within longer text blocks.