Always be aware of your surroundings and have a buddy when walking at night. Like anywhere in the world, some cities are safer than others. Do your research before you arrive and learn about about what petty crime looks like in the location where you'll be living. Be confident when you walk and blend in as a local. People looking to steal will often target people who stand out as tourists. Pickpocketing tends to be a very common offense, so always be aware of your purse, phone, and wallet, especially if on public transportation. Learn your surroundings and safety will follow.