3. Facts, arguments and examples of why drinking is a bad habit
Without concrete examples and facts your talk will be less powerful. Be effective and think of good facts and examples that prove how right you are. It’s easy to do since deep inside the person understands that alcohol is evil.

4. Tolerance rather than ultimatum
Forbidden fruit is sweet. Remember this phenomenon and follow the opposite. There is no need for ultimatums. Be open-minded enough. Your tolerance will be more effective. Let the person see that there are a few options and that his mission is to pick the best one.