The Pareto principle, better known as the 80/20 rule, states that, for many events, roughly 80% of the effects come from 20% of the causes.
Focus is your super power as an author. It will multiply the effects of all your tasks. Finding the reserves during a trying day can be hard, but focusing is what leads to your success.
Start building your team today!
Do not put this off for any reason. You cannot go this alone. Writing may be a solitary task, but publishing is a group effort. You need your team.
Writing is a business. Whether or not you treat it as such will determine your success.