By Nathan Potter

Search Engine Keyword Tools

Google AdWords Keyword Tool

Google Suggest (just start typing in search terms and suggested keywords will appear)

Wordtracker

Keyword Discovery (try their free trial first)

Google Toolbar: displays number of search results for keywords (aka Google Suggest)

Google Trends: Tip! type two or more keywords/phrases for comparison data (ie: oprah, ellen)

Pay Per Click Providers

Google Adwords

Yahoo! Search Marketing

Microsoft AdCenter

Cool Tools

ConstantContact: Email Newsletter Software

A Few Directories

Yahoo! Directory

Best of the Web

Business.com

Analysis

Google Rankings: helps you determine how your site is listed on Google, Yahoo & MSN for specific keywords

Google Analytics: free web analytics service - it's super powerful, so signup today!

Number of indexed pages from your site with search engines
(type the following into the Google, Yahoo or MSN Search Boxes | site:mywebsite.com)

Number of sites that link to your site
(type the following into the Google, Yahoo or MSN Search Boxes | link:mywebsite.com)

Yahoo! Site Explorer

Other Helpful Search Engine Marketing & Optimization Tools

Alexa Traffic Rankings

Way Back Machine: historical index of websites

Page Rank Explained

Google Webmaster Central

Pay Per Click (PPC) Video Seminar