5. They are disrespectful to local behavior.
Do not be impolite. Stop rushing. Just spend some time enjoying your life. If you are always in a hurry and frustrated, then you will only spoil your trip. If you are from an area that is intolerant and too conservative, then work on improving yourself. You cannot be a good traveler if you do not accept other cultures and traditions. Open up to the world and try to understand how varied and interesting it is. It would be very wise of you to do some research and find out more about the country you are bound for. Think of your habits and, if you know they will be misunderstood abroad, try to get rid of them at least for a while. Respect the country and people living in it.