Today, we'll talk through a framework that'll help you evaluate whether you're building something useful enough to anchor a business. Most startups fail because the thing they built doesn't make a big enough dent in their customers lives. We'll make sure you don't make this mistake with help from Habit Kangaroo, a startup Brian ran back in 2014, and a GMAT training program his friend ran that helped people get into Harvard. 

0:30 Building a Wildly Useful Startup