Time
You do not need more hours. You need fewer decisions.
You cannot manage time, only the number of things competing for it. The leverage is choosing less often, so attention reaches the work still intact.
Going deeper
Everything above works. This is what it does not cover.
Written mechanisms are good at explaining what to do and poor at showing what it looks like when it goes wrong. The time lessons are filmed on real cases, including the ones that do not resolve neatly.
Coaching exists for the part no article reaches: your constraints, your week, and the specific thing that keeps breaking after the third attempt.