Keyword Research | Tools and Analysis | Useful Resources
Tools
Google AdWords Keyword Tool
Treat the reported search volumes with a heavy pich of salt, but this tool is a good starting point, and at least provides an indication of keyword popularity relative to other terms in the same niche.
Google Search-based Keyword Tool
Provides keyword ideas based on actual Google search queries and matched to specific pages of your website with your ad and search share.
Google Insights for Search
With Google Insights for Search, you can compare search volume patterns across specific regions, categories, time frames and properties.
Popular Searches
Updated once daily, this SEOmoz report is an aggregation of popular search queries gathered from various sources across the web.