Emigrating from India to California with his family at age 4, Gurbaksh Chahal struggled with bullies at school. But he leaned on family for strength that would become his entrepreneurial fuel. He dropped out of school, started a business and never looked back. Chahal sold his first online advertising startup ClickAgents for $40 million, cashed out his second company BlueLithium for $300 million, and now he's on his third venture, RadiumOne.

In this 'Trep Talk Extra, Chahal dispels the myth that you need a brand-new idea to launch a business -- and offers advice for starting up.

'Trep Talk: Gurbaksh Chahal on Turning Obstacles into Opportunities