The sites have a rating system where comments are given for those who they met.
Know the house rules before going to the country
You need to accept the house rules before going to the country in order to avoid any type of conflict whatsoever.
Learn how to obey the house rules of your host
You need to make sure that you follow the house rules of your host in order to have an easy going time.
Be culturally sensitive
There are a lot of things that you need to learn from one person, not to mention someone from another culture. You need to do a couple of research first before you go to the host because cultural sensitivity is a good thing to have.
Respect belief of the host
You need to understand that you may differ in terms of practices and beliefs. Since you are taken as a guest, you have to respect what they believe.
Look at a reputable couchsurfing site
A reputable couchsurfing site will allow you to have a knowledge of the best people to get help from.
Travel with an extra cash
You need to make sure that you have some extra cash just in case there is an emergency.
Inform the host of any type of allergies or illnesses
You want the host to be aware of these things especially if it is a health issue.
Always taking extra precaution
You need to know where the embassy is, and you need to make sure that you have a contact person when doing activities in the country