title: What is the best method for resizing images to a fixed height and width while maintaining image ratio?
body: <p>On <a href="http://trekeffect.com/home" rel="nofollow">my startups site</a> you'll notice in the featured destinations section that I have destination images that have a fixed height and width set by using CSS.  The problem is that my images do not maintain their proportion, yet I want them at this size and I want them to look good. </p>
  
  <p>How should I resolve this issue?  Should I make sure that all images that are uploaded are cropped at the necessary ratio?  If so, can I do this automatically using PHP so that I don't have to manually do it?  </p>