Don't lose sight of user delight.
Not having a clear goal leads to death by a thousand compromises.
You're not smarter than your competitor. Just copy what they do and do it until you get their numbers.
The first rule (of investing) for me is don't have rules. You find one amazing investment and that's all that matters. If you pick the right body of water, you might not need a boat.
My approach is that you have to earn the respect of people you work with.
I think we live in a unique time - the verbs that make up our online and mobile lives haven't been completely invented or imagined for us. That was kind of a life path I was on.