翻译：在你演讲之前，我能给你几个关于怎样使你的演讲成功的忠告。(tip)

Before you go and give your speech, I'm going to give you a few advice on how to make your speech a successful one.

In your speech, I will give you a few on how to make the success of your speech advice

Before your presentation, I could give some suggestion on how to make your speech successful.

我这个是语气比较和善的。上面的2个都有点强硬。