Avoid walking alone or traveling to remote places after dark; avoid poorly lit streets and narrow alleys.
Do not wear flashy jewelry.
Avoid public demonstrations, accidents or civil disturbances.
Do not engage in loud conversations or arguments.
Avoid discussing personal matters with people you do not know.
Keep a phrase book handy.
Know how to use the pay phones in the country you are visiting, and carry exact change in local currency.
Avoid bringing any unnecessary attention to yourself.