Maybe make a work-related to-do list and a personal to-do list to ensure you can merge those together in a time frame that makes sense.
We try hard to schedule ahead of time what our known work is,
There's always going to be some unknown work that comes up. Then it's just a matter of communicating with your people and letting them communicate back what they can and can't take on at that time.
If you know that you have a certain amount of commitments coming up within this time frame, it's really a matter of sitting down for a few minutes and prioritizing your time,