If you look at it , Fitbit for dogs seems like a gimmick business. Who would think that this will become successful. Yet Ben Jacobs proved that this is a worthwhile business and started it and finally sold it for $100+ million.

Let us see how he did it.

Jeff ran out of money and was not able to pay his employees. On top of this, his company got sued, yet he kept pushing forward and succeed and sold StubHub to ebay for $300+ million.
Let us check out how he did it.

Francesco Clark was living a happy life  but suddenly his life was hurled and turned upside down by an accident leaving him paralyzed and not able to move 95% of his body, Yet he built a multi-million dollar business.

Let us check out how he did it.

Microsoft and Quicken were leaders and giants with lots of cash and marketing power in the personal finance software business. Yet, Aaron took on the giants and built a "sure-to-fail" business and sold to Intuit for $160+ million.Let us see how he did it.

Kevin worked on his startup idea close to 2 years but it didn't take off.  He took a risk, scraped his old idea and went with a new idea, which he found almost by accident.
It was a hit and Facebook bought it for $1 billion. Let us check out how he did it