Well known to you are the useful pay-per-click admin tools of Wordtracker and Overture along with AdWord Accelerator. These tool help evaluate and set up keywords, bidprices and find the top performing ads. Lets look at some others that have attributes that make them singular and a valuable asset. There are two: Keywords Analyzer (www.KeywordsAnalyzer.com) and Adword Analyzer (http://www.adwordanalyzer.com/).

If I were to look in your toolbox out in your garage, most likely I would find both a flat head and a Philips head screwdriver. This is like your keyword tools. The same way you need more than one kind of screwdriver you need more than one keyword tool. Individually they have their strong points but together they represent an entire set of tools, not just two screwdrivers.

There is no end to learning though. Whether your keyword list is long or short, the first one will most likely be missing something. A major search engine company once reported that out of total searches 20 percent were wholly unique. People search for all kinds of things and use an unlimited variety of words. Therefore here are some out-of-the-ordinary notions for you to consider:

Be sure to have plenty of synonyms and relevant subjects in your hoard of keywords to be certain that you are connecting with those who are looking for what you have.

Make a play for brand names as keywords, though you will most likely have to wade through copyright issues. Because it has allowed AdWords users to bid on trademark names, Google has had plenty of it's own legal affairs. Anything related to your topic is worth looking into, celebrated people, noted places, company names, publications, group organizations all may be associated with what you are advertising. Such as the name of a celebrated golfer for "golf equipment" or the name of a famous guitar player for "guitars"

Misspellings are a big opportunity, because so many advertisers don't bid on them, and the clickthrough rate is often higher. For a Lord of the Rings promotion, "Tolkein" (misspelled) got twice the CTR of "Tolkien" (spelled correctly).

An impressive website that is handy for pay-per-click advertisers is LexFN.com. In essence it is a massive thesaurus that utilizes the internet to compile synonyms and relevant concepts into a comprehensive list. What an entertaining site to fiddle with! Just bidding on the conventional word not on variations you will miss out. Utilizing "expanded phrase matching" feature Google offers can help, but it is better to use the exact words people type in and it will almost always cost you less. Example: WalMart, Wal-Mart, Wal Mart.