How to travel safely: Keep a small notebook or note card on you, with important phone numbers and information written down. Include the numbers and addresses of your hotel and the embassy of your country, instructions on how make emergency phone calls, and photocopies of your travel documents. Keep both digital and print versions of this information—just in case you lose your phone.
How to travel cheaply: Hopper will let you know when to buy your plane tickets for the best prices. I recommend frequently checking the app for the ideal flight times that you want—even if the app is telling you to keep waiting.
How to travel lightly: Consider your photos your souvenirs. Bring a small journal to document your favorite little moments from each day. Your memories and experiences should be your most dear possessions.