How to include jquery.js before other javascript includes? I'm using a jquery carousel on my site and getting some errors on some pages. My jquery guru said the cause of the problem is that currently jquery.js gets included after other javascript includes. 

Making the jquery.js the first include will fix the problem according to him. How do I change the order of the javascript includes?
Use hook_js_alter to change the order of js presentation.

For example, edit your theme's template.php:

function youtheme_js_alter(&amp;$javascript) {

  $javascript['misc/jquery.js']['group'] = -500;

  $javascript['misc/jquery.js']['weight'] = -500;

}