The dash helps to indicate that the two thoughts are intimately related, and it's less stodgy than a semicolon, which would have performed the same function (and who talks in semicolons?).

Everybody's got an opinion. Leaders are paid to make a decision. The difference between offering an opinion and making a decision is the difference between working for the leader and being the leader.

Commit yourself to something you have a passion for.

"Extra effort," in whatever form it takes (mental, physical, emotional), cannot be sustained without eventual damage and diminishing returns. There has to be a very acute awareness on your part as to the level of exertion and the toll it's taking on those you lead.

Concentrate on what will produce results rather than on the results, the process rather than the prize.

Before you can win the fight, You’ve got to be in the fight.

Invest in great relationships, they will pay a lifetime of dividends.