The best leaders and some of the most influential people were friendly to those around them. People liked them. They wanted them to do well. This is key to good leadership.

Have no more than 3 items on your to-do list each day.

Instead of doing a million things poorly, the goal becomes to do a few things incredibly — or better yet, to do one thing better than anyone else in the world.

A good manager’s job is to help you and the rest of your team get better results. So it would be logical that she should be invested in your career. When you do better, then by extension, she does better. 

Hence, your manager should be on your side, who wants you to succeed, and who is will...