Holiday should be full of fun with no trace of tension and worries. So when you plan your holiday it should also be safe. Take small precautions and enjoy your trip.
Safeguard your luggage: Tie a bell in your luggage so that you can hear the tinkle in case anyone tries to pull your luggage. Be little alert while having coffee or dinner.
Don't mention your home address: Don't write your home address on them. Instead fill in with your business address. Anyone can make wrong use of your home address. So be alert.
Properly check your room: While checking in a room try to choose a room in second floor or above, it's safer than the ground floor. Properly check the room for unwanted things like hidden camera.
Keep your money safe: While travelling, you often carry good amount of money, so it's very important that you keep them in safe place. Never keep all your cash in one place. Put some down a sock, some in that little inside pocket of your jeans, etc.
Carry your hotel address: While going for sightseeing it may happen that you get lost and unable to reach your hotel. To avoid this scenario in an unknown city always carry your hotel address and contact no so that you can ask anyone to guide you way back.
Carry medicine: In case you have some allergy or any critical health issue carry your medicine as you never know when you need it and may be its not available in a new town.