My way of using Dan’s pattern is to define all public properties (not methods) in the object __pthis:

function Image(width, height)
{
// standard header
this.__pthis = {};
var pthis = this.__pthis;
// end standard header
//
pthis.width = width;
pthis.height = height;
//
this.__construct();
}

And then in a method I can do:
function multiply()
{
var pthis = this.__pthis; // standard line for all the methods to make __pthis local variable
return pthis.width * pthis.height; // example of how to access the properties
}

So I’ve got only one public variable __pthis (except for the public methods) and its easy to remember not to touch it from the outside code.

When I call one method from another method I use myMethod.call(this, arg1, arg2) as Dan recommends, to pass context. For me there’s the only inconvenient thing in that pattern I have to do – using call() method to call my methods. But I have the maximum speed and memory saving (it can be good especially for mobile devices).