Do one thing at a time, a bunch of half-cut trees are not useful to anyone.
Instead, focus on reaching completion.
This is especially difficult for anyone who works in a job where you don’t have a finished product, which is typically management.
Your definition of “done” can be nebulous, and you may be surprised how this can affect both job satisfaction and mental health. This is why it is important to have some tangible hobbies or side projects to fulfil this human need.
The larger the corporation you work for, the less impact your individual actions have, and it is more difficult to understand your impact on the whole.