The practice of criminal law involves a lot of waiting. Waiting for your case to be called. Waiting for the jury to render a decision. Waiting for the clerk to prepare an order.
Your time is a finite resource.
One of the keys to effective practice is to always bring other work with you.
If you want to carve out time for your family and your other interests, you need to take advantage of your time spent waiting as opposed to wasting it.