If you want to focus and make the very best of your dollars and time you need to see the returns from your actions and make sure they are doing what you believe they are.  For example do you know: if mobile traffic is up, where the new visitors are coming from, how high your bounce rate is, who is making return visits, and are they sharing or referring others?

It is important to be patient, disciplined, well informed and aware that information analysis across web managers, inventory platforms and various utilities like media trackers or Google Analytics test and measure the effectiveness of actions that can easily go unseen.  Don't disregard the impact information analysis can have when it is correct and equally when it is faulty.  Remain diligent and conscientious about the data you enter and you create good grounds for decisions, not just options.