How to make strong arguments in the TEF/TCF exam

I would like to raise an important topic that is relevant for both exams – TEF and TCF, both for the oral and written parts. This is the ability to give arguments in defense of your opinion.
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In terms of argumentation, many make mistakes that lower the score. Moreover, this is not so much about grammar and vocabulary, but about logic.
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❓How to make a strong and most importantly relevant argument? How to make argumentation effective?
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✔️Before moving on to defense, formulate a thesis that you plan to defend.
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✔️All your arguments, without exception, must be related to this thesis. It is better to exclude everything that relates to him indirectly from the text or monologue.
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✔️Each thesis must be supported by an example from your life, from the lives of other people, or some generally accepted fact.
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✔️Use the information given in the assignment and talk only about what you are sure of. Try not to make things up.
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✔️Sometimes you come across complex topics that are really difficult to pick up arguments on right away. For example, convincing a person to fill up his car with oil instead of gasoline. Here we can advise you to develop your erudition and, in chats and communities, monitor topics that have already come across in exams, so as not to be confused by surprise.
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It happens that candidates try, unconsciously or consciously, to take the topic into a direction that is more familiar to them. This is both good and not so good. Good - because it gives you the opportunity to speak out on a topic in which you are strong. Not really - because if you do this unconsciously, there is a risk of going far from the plot, thereby spoiling the result.
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In general, arguments are a rather interesting, voluminous and necessary topic. I have accumulated a lot of useful information on it. I will write more.