It's become popular in recent years to say that the idea doesn't matter.
Great execution towards a terrible idea will get you nowhere.
When it comes to starting startups, in many ways, it's easier to start a hard startup than an easy startup.
Momentum and growth are the lifeblood of startups. This is probably in the top three secrets of executing well.
You need unstoppable people. You want people that are just going to get it done.
Most good founders that I know at any given time have a set of small overarching goals for the company that everybody in the company knows.