Keyword research is one of the foundations of affiliate marketing, and getting traffic online, with out knowing what keywords to optimize for its pretty much like walking in the dark, here are a few decent keyword tools to use:
- http://www.FreeWordtrackerTool.com
- https://adwords.google.com/select/KeywordToolExternal
- http://www.freekeywords.wordtracker.com/
- http://www.freekeywords.wordtracker.com/gtrends/
- http://www.google.com/trends
- http://inventory.overture.com http://freeadwordstool.com
- http://www.FreeKeywordDiscoveryTool.com
- http://goodkeywords.com/
- http://www.keyworddiscovery.com/search.html