Marketing has always been about the same thing - who your customers are and where they are.
A true measure of an entrepreneur / successful-person is how they deal with adversity.
Consuming is the opposite of producing.
My favorite business book of all time is experience.
A startup can focus on only one metric. So you have to decide what that is and ignore everything else.
No one ever got rich checking their email more often.
The hard part is what separates good from great.