This post is only about sleeping in/around airports.

Not good to work full day then take late night long flight. Not enough rest before long flight! Instead,

• Sugg: 3H JFK airport hotel. No need to sleep at U.S.->SG stop-over
• Sugg: (if enough time for sleep) sleep at home then take trains (MetroNorth, Subway, LIRR, Airtrain, minimum 100 minutes)

http://www.sleepinginairports.net/tips.htm:

• safety — sleep near fellow sleepers, near security cameras
• cap as eyeshade, alarm clock

–JFK: https://btv-open.dreamhosters.com/2017/07/08/hourly-hotels-jfk/

–Pudong: https://btv-open.dreamhosters.com/2017/07/08/hourly-hotels-pudong/

🙂 seats good.
🙁 the usual noise level. There might be a few relatively quiet yet fairly safe corners
lounges? no lie-down place
🙁 the correct gate is known only in the last 2 hours or so