Rob Fitzpatrick - (not) presenting your idea
"Leave your idea and your ego out of it."
Presenting your idea to other people is fishing for compliments, and compliments are bad data. Instead of talking about your product and idea directly, discuss on detail how people have handled their problems in the past.
Rob Fitzpatrick, author of The Mom Test, speaks about how to solve the issue, get commitments and keep away from guessing about the future.