You can't change the people around you, but you can change the people you choose to be around.
You have to believe in yourself when no one else does. That's what makes you a winner.
Never let your sense of morals prevent you from doing what is right.
The best way to learn econometrics is by doing—working with real data and real problems.
Confidence is not "they will like me", it's "I'll be fine if they don't".