Culture Shock

There are many factors that contribute to culture shock, which can include one's customs, religious beliefs and personal feelings.  Culture shock usually happens when someone emigrates/immigrates to a new country and cannot adapt to his or her new situation.  To deal with culture shock, there are a couple of (you only mention two) suggestions, which could be grouped into two major (main) categories.  The first includes activities that an immigrant can do before going to his or her host country; the second includes activities that should be done after he or she has immigrated (emigrated).  

Understandable, and perhaps correct, but awkwardly worded.  I started to rewrite what you wrote.

Either the grammar or sentence phrasing seems wrong or awkwardly worded

Confusing. Not sure what you are trying to say.  

Good job!  One could understand what you are writing.

Culture Shock

There are many contributors to culture shock, such as customs, religions, feelings and so on. Culture shock usually happens when someone immigrates to a new country and he or she can not adapt to the new situation. To deal with culture shock, there are some suggestions. These suggestions can be arranged into two major groups. The first parts includes activities that an immigrant can do them before going to the host country and the second part includes activities that should be done after immigration. Before going to the host country, reading more about the host country helps immigrants to know more about the situation and people's customs and feelings. On the other hand, after arriving in the host country, immigrants should try to have more communication with people and develop a routine to enhance his or her knowledge about new conditions. Going to the club or the gym is a good choice.
In the end, both of suggestions have their own merits and immigrants should use both of them to deal with culture shock.

-Very well-written, only minor corrections needed.