关键词
http://www.goodkeywords.com
http://www.wordtracker.com (free trial)
http://www.keywordelite.com (paid)
邮件列表
http://www.aweber.com
http://www.getresponse.com
Adwords论坛
http://groups.google.com/group/adwords-help/
http://adsensical-adsense.blogspot.com
网络营销论坛
http://www.warriorforum.com
Clickbank论坛
http://www.clickbanksuccessforum.com (英文) 