Learn to say no using filters
Use your big priorities to manage the daily to-do list. Manage your time with filters.
Know your top 3 objectives or priorities for the next quarter. (Don't list projects, but outcomes or desired states.)
Apply them as a filter to your to-do list. If that task is in your top 3 priorities, it's yes-now or a later this quarter. If not, it's a no. Say no and move on.