http://www.adwords.google.com/select/KeywordToolExternal 有名的adwords关键词建议工具
http://www.google.com/trends 中英文关键字搜索趋势
http://www.buzz.yahoo.com 最近好像很火
http://www.digg.com 可以从首页文章了解时事
http://www.index.baidu.com 百度指数,中文关键字趋势
http://www.top.baidu.com 百度热门搜索
http://www.google.com/press/zeitgeist.html
http://www.hotsearches.aol.com
http://www.pages.ebay.com/marketplace_research
http://www.nichebot.com 是个很重要的工具
http://www.mooter.com
http://www.channels.netscape.com/search/hotsearch.jsp
http://www.reviews.ebay.com
http://www.amazon.com/gp/bestsellers
http://www.boardtracker.com
http://www.keycompete.com
http://www.seodigger.com
http://www.labs.google.com/sets
http://www.adlab.microsoft.com/SearchFunnel/Default.aspx
http://www.43things.com 人们想做些什么
http://www.cbengine.com 研究clickbank的工具
http://www.cbtrends.com 同上

from:http://www.cnwebmasters.com/thread-13845-1-1.html

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