What is the fastest way to learn programming in order to make websites, web apps, iPhone and Android apps, OS X and Windows apps, and more efficiently?

I think some beginner programmers might view computer languages as distinct skills, or synonymous with computer science or software engineering.  This is not entirely true, and I'd like to offer an analogy. A great artist has years of training with form factor, negative space, color theory, personalized style, stroke and texture, and much more.  You could hand him oils, water color, pastel, pencils, chalk, etc.  He would most likely still produce pretty great art, even if his exposure to each medium was brief.  On the other hand, a novice artist would not produce great art by simply learning to wield a pencil, or an oil brush, or chalk, expertly. I think there are unfortunately no shortcuts to becoming the "great artist" in my analogy.  With years of experience you internalize the underlying computer science and engineering practices involved in *good* programming.  An experienced programmer would look at most languages and say, "yeah, I get it" fairly quickly.  It's just a different medium with slightly different syntax. Additionally, unless your projects are truly trivial, they will probably take you much, much longer than anticipated to complete.  So my advice would be to focus on building one product, in one language.  You will learn more of the core programming knowledge along the way, which will be applicable to other languages.  To that end I would recommend Python, Ruby, or Javascript, as they are meant to be human-readable and are the least obstructive towards learning key programming concepts.

You develop apps in HTML+JS and then use Cordova with basic knowledge of other platforms like iOS, Android you can port the same application to these platforms thus reducing the development time and time takes it to learn languages like Objective C, java etc