Trying to get work done uses the same principle as running: You have to pace yourself. Runners that sprint at the beginning will be tired out long before they reach the finish line.
One of the ways to pace your work is by maintaining weekly and daily to-do lists.
After you finish your daily list, you don't work on more projects or tasks. After you complete the weekly list, you're done for the week.
Deep work is a term developed by Cal Newport, stating that all intellectual activities should be performed in a state of distraction-free concentration that pushes your cognitive capabilities to their limit.
On the other side deep work is “half-work” or “shallow work”. That kind of low‑value work usually goes along with multitasking, working on many projects, and having distractions in the environment (email, chat, and others).
Software that can help you do deep work:
Sometimes you might prioritize a task only to have expectations or deliverables change on you. At this point it’s hard not to be disappointed. But you can’t let that skew your judgment.
Humans are especially susceptible to the “sunk cost fallacy” —a psychological effect where we feel compelled to continue doing something just because we’ve already put time and effort into it.
Don't be that person, learn from your mistakes and move on.