The Leading Cause of Startup Death – Part 1: The Product Development Diagram
steveblank.com
steveblank.com
I got Steve's book a few months ago and have been reading it ... and re-reading it ... and re-reading it.
I slap myself in the forehead about every other page.
The point that he makes in this blog post is key.
Go, read it.
Personally, I think that by getting into the development of your idea as soon as possible will help you. As an added bonus, there are always ideas, features, or a different method of implementation that get brought up while you are developing that you cannot anticipate during the planning/conceptualizing phase.
I sure hope someone posts Part 2 here at hn before I forget why I was so interested. A serialized blog is an interesting idea until it has a cliffhanger.