How can one find time to do everything effectively in life?

We feel 100% occupied with varied number of things that we are engaged with in life. And when we look closely, this doesn't really take a lot of tasks usually.
If you notice, you will realize that one can get (or feel like) totally busy with any amount of tasks and when multi-tasking and juggling between different things, the effectiveness of the work depends on how one is able to complete individual pieces with their utmost focus. When one is focussed on their work, distractions are the one of hinderances that comes in the path of effectiveness of a task. Distractions could come in the form of phone calls, emails, requests over online chats, scheduled meetings, someone walking into the workspace for a talk, etc and majority of them result in adding up some kind of work to be performed. While it interrupts one's attention, in the modern ways of operating through life, most of these modes of communication are necessary to function and we need to be prepared for all the distractions that comes our way. Let us look at some of the ways to better handle and succeed in such circumstances:
1. Give our 100% attention to the current task at hand, for however small amount of time it may be, before being distracted.
2. Complete the things that can be done quickly.
3. Retain Context for switching off and back.
4. Maintain, Prioritize and track all pending To-Do's.
5. Set the expectations and commit based on the current To-Do tasks and their priorities.
6. As applicable, not taking up the work that is expected out of someone else.