I believe there are times when we need to put in extra effort to make a difference. It may be a crisis which needs our attention or a festering weakness which must be addressed. The truth is sometimes there is no substitute for hard work.
The key to hard work being effective is to make sure it's focused in the right area. Putting all our increased emphasis in the wrong direction will make us look busy, but it won't solve the problem. It's like needing a ditch to be dug that runs from north to south while we're digging one that runs from east to west. Increasing our pace, shortening our breaks, and using a bigger shovel brings the appearance of productivity while neglecting the real issue.
Don't be afraid to work hard, but make sure it's the right work too.