Long airport stopovers are a bane of the business traveller. It can be a poor connection between flights, or extended waiting times due to delays or cancelled flights.
And while some airports let you make the most of a 12-hour layover by quickly and easily escaping to the city – Hong Kong and San Francisco spring to mind – most see you trapped in transit.
Cathay Pacific’s The Wing First Class lounge at Hong Kong sports private ‘cabana’ rooms.
It's worse when you've arrived on an evening flight or your body clock is out of whack.
The SleepingInAirports website rates Singapore's Changi Airport as the best place to grab some shut-eye during your stopover.
Seoul, Hong Kong, Kuala Lumpur, Amsterdam and Helsinki also made the A-list when it comes to catching Z's, according to a poll of over 18,000 travellers.
However Sydney, Perth, Manila, Mumbai, Los Angeles and Rome all find their way on the website's roster of shame for the worst airports for sleep-seekers.
But you don't need to rough it. Transit hotels located inside the airport's security zone, such as those at Singapore's Changi Airport, can rent rooms for six hours at a time.
While they're a decidedly three-star 'no frills' affair, you get a bed, bathroom and shower of your own as a short-term haven.
A new twist for weary travellers is the the aptly-named Napcab – a private cabin in the middle of the airport where you can grab a snooze between flights.
The creators of the Napcab hope to one day see their compact self-contained units in airport departure and transit areas around the world, although at this stage they're found only in Munich Airport's terminal 2.
It costs €15 (A$20) per hour to rent a Napcab. Inside the air-conditioned single room module is a full-length bed, alarm clock, iPhone docking station, TV screen (which also shows flight information), a small desk plus wifi Internet access.
Several airlines also boast lounges with dedicated snooze-friendly zones, especially at the larger airports.
Malaysia Airlines' first class lounge at Kuala Lumpur has five cosy, if spartan, slumber rooms.
Cathay Pacific's newly-opened The Wing First Class lounge at Hong Kong sports five private 'cabana' rooms with a day bed, shower and indulgent full-sized bath.
There's also a pressing service to give your shirt, pants or skirt a quick freshen-up while you take a soak.
You can't book the cabanas in advance, so it's first come, first served – but nor is there any time limit.
Once you've snared a cabana, it's yours until your flight departs or the lounge closes at midnight, whichever comes first.
But perhaps the best private rooms I've seen belong to British Airways' first class Concorde Room at London Heathrow Terminal 5.
These include a day bed, ensuite bathroom, work desk, pressing service and meals delivered from the lounge's a la carte dining room. It's almost enough to make you wish for your flight to be delayed.
What are your tips for catching some shut-eye during an unexpectedly long stopover, and which lounges take the best care of a tired business traveller?
David Flynn is a business travel expert and editor of Australian Business Traveller.