It takes time and practice to recognize logical fallacies as they're occurring, and also to be careful you don't fall into the same trap. Basically any persuasive argument should contain ethos (credibility), logos (logical argument using inductive or deductive reasoning), and pathos (inspire emotion in your audience). Skilled orators don't always believe the shit they're peddling, it's just that they know how to wield these techniques effectively. Sometimes, inspiring emotion in your audience is more effective than presenting a logical argument. These are tools only, and they can be mixed and matched as needed to persuade your audience to agree with your side of an argument. But when all else fails, as a rule of thumb, you should stick to logical, deductive reasoning and avoid employing logical fallacies to make your point.