"Customers don’t want your product or what it does; they want help making themselves better (i.e., they want to transform a life-situation, make progress)." 
"I decided to make a project that did only one thing and did it well, with the goal instead of succeeding being to not fail. Anything is better than never shipping. The result was BitTorrent." 
“Once you’ve built something of value, your marketing isn’t telling people what it is; they’re smart enough to figure that out, telling them how they can use it.” 
“What we call profit being the reward for understanding an aspect of human nature ahead of the competition." 
Focus on solving one thing well. Focus on helping people become better versions of themselves. Tell them how they can use it.
That's the focus.