There are only so many hours in a day. Determine what your upper limit is for work capacity before you carve out your schedule for the week. When are you most productive during the day. If you're not sure, take a day or two and keep a log of what you did and when.
A day can quickly get eaten up by constantly checking and responding to emails. Do yourself a favor and set a specific time in your day to address your inbox and then mute notifications during the rest of the day.
In the early 2000s, the American Psychological Association (APA) conducted a study on multitasking. They concluded, “…even brief mental blocks created by shifting between tasks can cost as much as 40% of someone's productive time.”
Instead of shifting your focus between multiple tasks simultaneously, which you can't really do effectively, try time blocking. That ensures your undivided attention can be committed to the task at hand.