Are you going to war everyday? Are you fighting hard everyday? Is everything a matter of life and death to you? Do you treat everything with the same seriousness? Is every e-mail, memo, letter, comment, is of the same importance to you?
If you answered yes to any of the above, then you are going to be a spent force sooner rather than later.
Working hard on everything everyday is tiring and consumes our resources in more ways we can see. To enjoy life and work, we must be able to sieve what is important from what is not.
Each of us have different priorities and everyday brings different challenges. Some will be more important than others and demands more from you. Others have lesser importance and a few will be of no value to you. Know the difference and eliminate those things that have no consequences to you. Forget it and focus your energy on the things that will affect you.