Lean business planning doesn't mean no business planning. The formal written business plan has long been obsolete. A real business plan should grow organically, with regular review and revision.
Professor Steve Blank says the quickest way to create the next Instagram is to move basic human social needs -- like friendship, dating and sex -- into the digital world.
Many startups fail because their founders don't take the time to talk to potential customers before opening. Here are a few tips on getting feedback effectively.