Most career advice is about what to start doing. Equal value comes from a 'stop doing' list — activities, commitments, habits that consume time without producing meaningful career value.
What typically goes on the list
Committees that don't advance you. Volunteer work that drained you. Constant availability to colleagues. Meetings you attend out of habit. Email outside work hours. Networking events that don't suit your style.
Quarterly audit. Most professionals find substantial time freed for higher-leverage work.