It's easy to complain about a manager who wastes time. It's much harder to see how you might misuse that manager's time. Here are three ways to minimize the impact you have on your supervisor's tight schedule:
Self-delegate. Avoid requesting her intervention too often. If you or one of your direct reports can accomplish the task without your boss's help, do it.
Present solutions, not problems. Don't bring problems to your boss to solve. Instead, bring proposed solutions, and seek her/his feedback.
Accommodate her working style. For example, if she/he prefers to receive information in writing rather than in person, honor those preferences even if it's not your style
Source: Harvard Business Publishing : Today's Management Tip was adapted from the Harvard ManageMentor Online Module: Time Management.