Remove Bootstrap.js dependancy (usually, you don't need it)
Heavy reliance on async ajax calls (only load visible page content, load everything else on scroll using a function like below)
$(window).ready(function () {
$(this).one('scroll', function () { //only executes once
// call this data when a user scrolls down for the first time
// only do this with below-the-fold content
});
});
Make efficient database queries, bundle them together when you can.
This is an awesome list that will be really useful and mostly front-end or cross-(back-end) like gzip, which is awesome. Also the tools are a great plus, thanks (: