Notes on prototyping – Ben Frain
Good tips on prototyping using the very materials that the final product will be built in—HTML, CSS, and JavaScript.
The only thing I would add is that, in my experience, it’s vital that the prototype does not morph into the final product …no matter how tempting it sometimes seems.
Prototypes are made to be discarded (having validated or invalidated an idea). Making a prototype and making something for production require very different mindsets: with prototyping it’s all about speed of creation; with production work, it’s all about quality of execution.