BizSugar.com › Startups › Startup Professionals Musings: Here Is When Your New Business Needs A Written Plan

If you sold your last startup for $800 million, you probably already know how to build a business, and even conservative investors won’t worry about the quality of your next business plan. But, for the rest of us, don’t believe the Silicon Valley myth that all you have to do is sketch your million-dollar idea on the back of a napkin, and investors will line up to give you money.