You miss the details at 50000ft and you miss the big picture at 100ft. Both are needed for success.
How do you get both the views and get the balance ?
One way to do this is first get the hundred feet view and then check to see whether it meets all the objectives and requirements. You need to be objective and dispassionate to ensure 'proper' checking.
You can also do the 50,000 feet view and then get into details to make sure all the objectives and requirements are met.
The typical mistake people do is take one view and ASSUME that it meets the requirements of the other view. More often than not it doesn't and we end up finding it the hard way!
As one looks at taking bigger responsibilities , achieving this balance becomes more and more critical.
Initially you can request your friends or colleagues to help you get this balance so that over time you inculcate this habit.
Remember! Plans that meet only one view's requirements are bound to FAIL!