Europe

Transport: low-cost airlines (Ryanair, EasyJet, Wizz Air), FlixBus buses, Interrail trains (if many transfers). Accommodation: hostels (€15-40), Airbnb (share with friends). Food: supermarkets, street food, lunch cheaper than dinner. Free: museums on certain days, walking tours, parks. Eastern Europe is cheaper than Western Europe: Balkans, Baltic states, Poland.

A single train ticket for 33 European countries. Interrail — for residents of Europe, Eurail — for others. Options: number of travel days within a period (4 days in 1 month, 7 days in 1 month, etc.) or unlimited. Beneficial if many transfers. High-speed trains require reservation (extra fee). Book in advance at Eurail.com.

For the "Europe" topic, start with a plan: dates, budget, priorities (what is essential, what is optional). Then book critical items in advance.

Practice for "Europe": make a list of documents and deadlines (visa, insurance, booking, vaccinations). This prevents 90% of problems.

Answer for "Europe": use the 70/30 rule — 70% of the route is fixed, 30% is left for spontaneity and relaxation.

For "Europe" it is useful to have 2–3 alternatives (flights/hotels/route) in case of disruptions. Plan B saves nerves.