Sleeping badly while travelling has several causes beyond time zone change.
First night effect
Poorer sleep in unfamiliar surroundings.
Which is documented and normally resolves.
Environment
Noise, light and temperature in unfamiliar rooms.
Which simple equipment addresses.
Routine
Maintaining some consistency in timing.
Which helps more than most interventions.
Alcohol
Disrupting sleep architecture despite the sedative effect.
Which is well established.
The first night effect
Research has found that people sleep measurably worse on the first night in an unfamiliar place, with part of the brain remaining more alert.
Which is a documented phenomenon and normally resolves by the second night.
Knowing that it is expected removes some of the anxiety about it, and anxiety about sleeping badly is itself a substantial contributor to sleeping badly.
Practical measures
Eye mask, ear plugs and control over room temperature.
Which address the environmental causes cheaply.
Consistency
Keeping meal and sleep timing roughly regular.
Which supports adjustment.
Screens and light
Evening light exposure delaying sleep onset.
A general note
Persistent sleep problems warrant medical rather than travel advice.
What actually makes a trip go well
Very little of it is the things travel content concentrates on. It is not the property, the itinerary or the equipment. It is preparation on a small number of specific points, a pace that leaves room for things to go wrong, and enough humility to ask people who live there.
The trips that go badly are usually the ones where something checkable was not checked: an entry requirement, a health preparation, a transport connection, or the assumption that a place would be like somewhere else. All of those are answerable in advance and none takes long.
The preparation that repays itself
Entry requirements from the destination’s own authority. Travel health advice with enough lead time for vaccinations. A realistic daily budget including local transport, food and activities. Twenty words of the language. Somebody at home who knows roughly where you are.
That is an hour or two spread over the weeks before departure, and between them those five things prevent most of the situations that turn an ordinary problem into a serious one.
What travel writing tends to leave out
Most of it is written to inspire rather than to inform, which means it emphasises the extraordinary and skips the logistics. That is a reasonable commercial choice and it produces a systematic gap: the things that determine whether a trip works are rarely the things written about.
Entry requirements, health preparation, realistic budgeting and what a place is actually like on an ordinary Tuesday are all more consequential than any recommendation, and considerably less photogenic.
A general note
Entry requirements, health advice, safety conditions and local law differ enormously by destination and by nationality, and they change. Official sources for your own nationality and your specific destination are the only reliable reference.
On the destinations themselves
Almost every place is more ordinary and more interesting than its reputation. The reputation is built from a handful of images that a great many people have now seen, and arriving expecting them produces a disappointment that has nothing to do with the place.
The parts of a destination that people remember afterwards are generally not the ones they went for, which is an argument for leaving room in an itinerary rather than filling it. Whatever you plan, the unplanned hours are where most of it happens.
The travel that seems to be worth most
Longer stays in fewer places, some contact with people who live there rather than only with people paid to serve you, and a willingness to be uncomfortable occasionally. That is what the research on attitude change points at, and it is also what people describe when they talk about trips that mattered to them.
None of it requires money. Some of the most valuable travel is the cheapest, which is not something the industry has any interest in saying.
Where to get reliable information
Foreign ministries publish entry requirements and safety advice for their own nationals. Travel health services publish destination-specific medical guidance. National tourist boards publish practical information without a commercial interest in any particular property.
All three are free, current and specific to where you are actually going, which is more than can be said for most of what a search returns.
One habit worth adopting
Ask someone who lives there. Accommodation staff, drivers, shopkeepers and people at the next table know things no guide contains, and most of them are pleased to be asked.
It is also the part of travelling that people remember afterwards, which is a reasonable argument for it beyond the practical one.
A final caveat
Conditions, requirements and local circumstances change, and anything written at a point in time carries that date. Official sources for your nationality and destination are the reliable reference before any trip.