I`m wondering what the best way to generate long tail keywords is?

Selected answers from the Dumb SEO Questions Facebook & G+ community.

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  Ranu Jain: Well, most of the keyword research tools don't deliver much in the way of long tail terms. They return limited lists of popular keywords, with hardly any long tail keywords.
  
  Yes WordStream's free keyword tool, unlike other keywords suggestion tools, it returns a virtually unlimited number of keywords along with multi-word long tail keywords. You can try that.  ;
  
  You can also look for the suggestions that pop up below the search bar. For example, you may type in "Best Boutique" Google search may suggest "Best Boutique for Women."
   ;
  You can dig into your Analytics. Look into the web traffic section of your analytics program, there is a section that shows traffic sources and search terms. You can get an idea from there.
  
  Also, try checking the Wikipedia page. Look at the table of contents  ;and see what topics are subheadings in the article.
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  Justin Y: You can refer to the related search section at the bottom of Google for longtails. There's also tools like HitTail that will track incoming longtail keywords that help you to focus on longtails that already drive traffic to your site.
  Overall, I Personally think doing your homework and knowing your niche or industry is the best way to go. 
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  Dave Elliott: Uber suggest isn't bad. Its all but manual but its thrown up some keyword s I would never have thought of.