This is what time-management all boils down to, the decision you make from one moment to another, of what is most important for you and then focus your attention mainly on executing that and not something else.
4 Stepping Stones:
To Do List (Daily, This Week)
Calendar (2 Weeks, 30 Days, 90 Days, 1 Year)
Priorities (Goals and Values)
Manage Ourselves (Balance Needs, Wants and Demands)