I used to live by the "revealing module pattern", although I didn't know that's what it was actually called. Currently, I do something along these lines:

var MyObject = function() {

   var _obj = {}
  
   var privateVariable = 'foo'
   var privateMethod = function(){}
   
   _obj.publicVariable = 'bar'
   _obj.publicMethod = function(){}
  
   return _obj
 }()

To me, it makes the separation of public and private methods and variables easier to observe.

Also, an unrelated note: I've stopped using semicolons round about 6 months ago and have never looked back. It makes my life simpler, I'm happier, and my sex life has never been better.

EDIT: Removed syntax error (the "var" in front of "_obj.whatever")