As the leader, part of the job is to be visible and willing to communicate with everyone

The minute you step away from the negative people in your life you will instantly see the beauty in your horizon.

On occasion I omit commas. On occasion, I use them. (The more you know about English, the less you're likely to think there are unbreakable "rules" for a lot of these things.)

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?).

Failure is part of success, an integral part. Everybody gets knocked down. Knowing it will happen and what you must do when it does is the first step back.

Your enthusiasm becomes their enthusiasm; your lukewarm presentation becomes their lukewarm interest in what you're offering.

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