1. Have  the courage to say no.
2. Have the courage to face the truth.
3. Do the right thing because it is right.

"These are the 3 magic keys to living your life with integrity."
                                W. Clement Stone 

He is stating if you follow the 3 magic keys you would succeed in life and you won't do the wrong you will choose the right. He is also stating that if your friends go drink and smoke you would tell them no.
Example: If your friends decide to smoke and drink that means that you will tell them no that I don't want to smoke or drink I want to have a healthy life.