My number one recommendation to reduce jet lag on international flights which would include Red Eye flights is NO alcohol. This article offers 5 helpful tips when traveling on red eye flights and the first tip is NOT consuming alcohol. I enjoy a drink as much as anyone but for international and red eye flights it is definitely off limits. The other tip I found useful is bringing a change of socks and I recently started to take off my shoes on flights and it has made a great difference to get to sleep because my feet swell. My next trip to China I will definitely change socks and try this tip.
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