In the beginning, never turndown an invitation from someone, even if it's something you wouldn't normally do.
开始时,绝不要拒绝别人的邀请,即使那是你一般不喜欢做的事情。
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For requests you need to turndown for whatever reason, "create a stock response you can email that says something like, 'Sorry, but due to time pressures, I can't honor requests for…, '" he suggests.