Ben Frain gives some very useful and pragmatic advice on how to build web front-end prototypes.
Producing something of high fidelity, perfectly matching any flat designs, runs counter to the notion of creating something quickly. The challenge for the prototyper is therefore how to cut corners that don’t impact the fidelity of the prototype.
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.