Keep an eye on these tasks. They can prevent you from achieving your objectives.
Manage these tasks either by delegating them or rescheduling them.
Watch out for the incapacity of saying “no”. When tempted by accepting this kind of task, try encouraging the person to handle the issue instead.
You can still offer your help while also doing so that in the future, the person can handle her/himself similar situations. This will allow you to free some time in your own schedule.
It isn’t always possible to anticipate everything, problems and questions can appear at any moment. Leave some free time in your schedule for such issues!