One way to organize Javascript.

modulejs.js

var module = new function() {
    var define, definitions, require;
    definitions = {};
    define = function(moduleName, dependencies, fn) {
        if (fn === undefined) {
            fn = dependencies;
            dependencies = [];
        }
        definitions[moduleName] = {
            dependencies: dependencies,
            fn: fn,
            id: moduleName
        };
        return definitions[moduleName];
    };
    isFunction = function(param) {
        return (typeof(param) === "function")
    }
    showDefinitions = function() {
        console.log(definitions);
    }
    resolve = function(def) {
        definition = definitions[def];
        if (!isFunction(definition.fn)) {
            return definition.fn
        }
        deps = []
        if (definition.dependencies.length > 0) {
            definition.dependencies.forEach(function(dependency) {
                d = definitions[dependency]
                deps.push(d.fn)
            });
        }
        fn = deps.length < 1 ? definition.fn : definition.fn.apply(undefined, deps)
        return fn;
    }

    require = function(moduleName, callback) {
        r = resolve(moduleName)
        if (callback !== undefined) {
            callback(r)
        }
        return r;
    };
    return {
        define: define,
        require: require,
        showDefinitions: showDefinitions
    };
};

// Examples

module.define("$", jQuery);

module.define('user', {
    email: "hello@mail.com",
    name: "kelly kelly"
});

module.require('user', function(user){
  console.log("Callbacked : ", user, "is now available")
});

module.define('tracker', {

    track: function(options) {
        console.log(options, " TRACKED.")
    },
    trackUser: function(user) {
        console.log("NOW TRACKING USER", user.name)
    }

});

module.define('main', ["user", "tracker", "$"], function(user, tracker, $) {

    function init() {
        console.log("$$$$", $)
        tracker.trackUser(user);
    }
    return {
        init: init
    }

});

module.require('main').init();