What planning tool did you use for writing business plan for your startup?

Canvanizer: http://canvanizer.com/

Thanks, I will check it out.

Lean Canvas: http://leanstack.com/

Thanks, I'll check it out.

vi

Care to elaborate please?

https://en.wikipedia.org/wiki/Vi

Thanks for the clarification, for a moment I thought the guy gave me a fair advice.

Well, using vi seems to have worked out pretty well for him: http://www.paulgraham.com/bio.html

I think his point is that you are thinking about it wrong. Finding the right document template or correct organizational mindmap is a way of procrastinating; you should just start typing/writing.