Stand up straight, speak clearly and concisely, make eye contact and keep breathing.

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Of course (and now this is becoming a familiar tune), avoiding all eye contact to keep from staring is also a bad tactic.

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When Alwaleed travels, an advance communications team sets up a private phone network and satellite link, putting him in contact with his office in Riyadh and letting him keep an eye on the Arab TV channels in which he owns a stake.

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