I know that it's worth adding qualifiers to high value keywords to create long-tail variations which will later have the potential to rank well for the main keyword as well... My questions is, how important is it that the newly-formed keyword/phrase also be evaluated for search volume? E.g. "tips for job interviews" has a high search volume, but scores 72 in the Keyword Difficulty tool - quite high. I would therefore be tempted to create a "10 tips for job interviews" articles or something similar, yet THIS particular phrase is searched for <10 times per month... If there are not any easy-to-find qualifiers that also create a well-searched for keyword/phrase, is it still worth adding them?