here source Not printing your travel itinerary and relying on emails/text confirmations. This one caught my boyfriend and I out with Tiger Airways. If you don’t print your itinerary, you may miss the little notes such as “This Domestic flight leaves from the International Terminal 2″…. You will then find yourself driving an extra half an hour to the correct airport and potentially missing check in! Print out EVERYTHING!! Highlight any important info, such as seat number, check in time, transfer lounge info and baggage allowance!