Nowaday.This might include: valid travel documents such as passports, identity cards or visas for entry into specific countries and maybe your driving licence if you intend to drive your own or hire a car; travel tickets for planes, ships, trains or coaches and most airlines now expect you to check-in online before you fly and bring your printed boarding card with you to the airport.However, it is always wise to take some currency or a pre-paid debit card with you in case there are any problems.Travel to certain countries requires immunization against diseases.You should also consider purchasing some form of travel insurance to cover your costs in case your plane is delayed, cancelled, you lose any personal items or there is an emergency whilst you are on holiday.