Here are some tools we use when researching relevant and targeted keywords and phrases for our clients.

Look for the top 20 to 30 of the collection. Please note that the count may differ with various websites
since the amounts of search traffic they get vary. So take the count
results from only a single site.

Overture tool Pages

(http://inventory.overture.com/d/searchinventory/suggestion)

Wordtracker tool [recommended]Pages

Google Sandbox ToolPages

(https://adwords.google.com/select/main?cmd=KeywordSandbox)

Espotting ToolPages<br>
(http://www.espotting.com/popups/keywordgenbox.asp)

Related Pages

(http://www.related-pages.com/adwordskeywords.aspx)

After using these tools we begin to figure out the level of competition and amount of effort needed to rank you site for the keywords you have chosen. How much time and attention your competitors have put into their SEO efforts also fits into the equation.