Every ten seconds a new batch appears. Spend some time with these. As you watch, notice that misspellings are common. Your keywords should be descriptive two or three word phrases people might use to search for you. Simply enter the keyword or phrase and observe how many references are found.
Search engines ignore the most common words.
These are called stop words, because the engines don't bother to stop to read and index them. They also commonly ignore adjectives and articles, so don't rely on them as critical keywords on your page. Once you've selected your keywords and used them to create great content in the body portion of your page, it's time to unlock their true power by using a few specialized search engine optimization techniques. These techniques help the search engine readily recognize the truly important keywords on a page. Using them properly can make the difference between a page that ranks in the topmost positions for a search result and a page that's lost among millions of others.