I've found out that "prototype fast, then document extensively as you re-write" a great approach. Because you've fleshed out the ideas, found out what works and

I've found out that "prototype fast, then document extensively as you re-write" a great approach. Because you've fleshed out the ideas, found out what works and what doesn't, and now you can capture all that in docs. However, as always YMMV and you might not get the luxury of re-writing :)