"You should build this feature"
"You should make this small quality of life improvement"
"You raised a bunch of money why can't you also X"

Focus. 

Not claiming to be world-class at it. Varun is much better at focus than I am—I get distracted by shiny new things all the time. 

But ultimately you only have a fixed number of "shots on goal" before you lose momentum (and in other cases, funding). 

Have to constantly be asking yourself is this the highest priority thing we can work on? And if everything is high priority, then you're not focused.

Good clip below on what world-class looks like here (note that Jony doesn't think he is good at it).