title: How to find keywords (useful words) from text?
body: <p>I am doing an experimental project.</p>
  
  <p>What i am trying to achieve is, i want to find that what are the keywords in that text.</p>
  
  <p>How i am trying to do this is i make a list of how many times a word appear in the text sorted by most used words at top.</p>
  
  <p>But problem is some common words like is,was,were are always at top. Apparently these are not worth.</p>
  
  <p>Can you people suggest me some good logic to do it, so it finds good related keywords always?</p>