use modernizr.js in the head (because it won't work well in the body when rendering in IE7) then at the end before your jQuery-1.9.1.min.js and under that any jquery plugin you are using and after that the javascript you wrote to apply the jquery plugins or JS.
The order of which you load is important: If you would first load your jQuery plugin and after that the jQuery-19.1.min.js it won't load properly because it won't understand your plugin without loading jQuery-1.9.1.min.js