Sometimes I want to execute some custom code while chaining on a jQuery element and maintain that chainability.

jQuery Chain Custom Functions

$.fn.chain = function(func) {
    func.apply(this);
    return this;
}

$('#my-div')
    .fadeIn()
    .chain(function(){
        // Do something here
        // You can even use $(this) on your original element
    })
    .fadeOut();