Ăn mặc thích hợp. Nhớ chuẩn bị đủ tài liệu theo thứ tự. Yêu cầu kiểm tra âm thanh. Chuẩn bị các thiết bị và tài liệu hỗ trợ. Quyết định cách thức cung cấp tài liệu. Xin một ly nước. Soi gương trước khi lên bục phát biểu.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
If you need to appear authoritative, choose formal business attire. Choose a color that flatters you and keep bold accessories to a minimum. Bring your visuals, your tablet or laptop and your speech copy. If you're in a small room, ask someone to stand at the back of the room and see if he or she can hear you. In a larger facility, practice using the microphone so that your speech is neither too faint nor distorted. Try to arrive at your presentation well before your audience. Take the time to m