You can learn a lot from studying one business pitch. You can learn even more from studying 30,000.
Sean Wise, an entrepreneurship professor at Ryerson University, start-up expert and best-selling author, says he's always receiving pitches. Whether he's at a restaurant with his family or heading to the restroom, he says, there's someone eager to pitch a business idea.
"But I can't tell if a pitch is a good or bad idea in five minutes," the professor tells CNBC Make It. "It's disrespectful and a disservice to them."
However, Wise says that there are five things he's learned about creating a successful business after studying over 30,000 pitches: