Don’t be an elitist!
One of the most basic mistakes people make in PHP programming is failing to resize their images and files. Because it is supposedly a “small” thing, this is precisely what makes it easy for many PHP programmers to overlook.
Don't be an elitist!
What the failure to resize simply does is to make your site harder to access, as people with slower internet connections or short attention spans (or worse, both) will just skip viewing your site altogether, which would be a shame if your site and your content is well crafted. You might as well put a big bright disclaimer on your site that says, “People with slow internet connections – GO AWAY.” And that, friends, is elitism, albeit unintentionally done.