I want to invent something cool.
the most rewarding thing is to see your idea, product or service come into reality or be used by others. The most frustrating is the need for further finance and the lack of incoming revenue from the outset..
they often drink their own cool aid and often ignore the one thing everyone else can see as the key hurdle to success (for the purpose of painting a picture of success)
prepare , prepare and prepare some more.. also do the top three hardest things you need to do first thing in the day every day never back away from this rule