We’re not a huge fan of buying keywords, but having the right keywords in your posts sure helps you get placement.

If you aren’t sure what keywords you should use, think about what you would use to find your post in Google (or Yahoo if you must) and then try them, see who pops up. But, what about the related words? That’s where the Overture Keyword selector tool comes in handy:

Overture- Keyword Selector Tool
Keyword Selector Tool

• Enter a term related to your site and we will show you: Related searches that include your term
• How many times that term was searched on last month

Or you can use the Google tool:

Google AdWords: Keyword Tool
Keyword Tool
The Keyword Tool generates potential keywords for your ad campaign and reports their Google statistics, including search performance and seasonal trends. Start your search by entering your own keyword phrases or a specific URL. You can then add new keywords to the green box at the right.

Either tool should help you focus your posts for maximum web search rank.