Before you write a good thesis, you should understand fully the meaning of this word. So, what does a good thesis mean? Good thesis is a sentence that elucidates the main idea of your work and it answers the questions that were asked in your paper. In your thesis you should assert what you believe in and what is going to be proved. It should be the principal point of your work. By mans of a thesis, you need to convince the readers in your point of view. This key point distinguishes a research paper from a work that just enumerates the facts.
 
That is why to make good theses you need to find and study a lot of materials. In that case you will be able to formulate the problem properly and bring out the main questions. Good thesis should be precise and dedicated to a particular problem so that the reader could quickly get the essence of the matter. Keep in mind that a good thesis should touch only upon the problem that you review in your paper. Probably, you have lots to say, but remember that you will not be able to say everything you want in a few sentences, that is why think over the whole paper properly and do not include any additional information in your thesis.
 
Good thesis should be disputable, it should contain the point that readers can argue with. If you consider your thesis to be a good one, you should expect various questions and you should also be ready to answer them all.
 
In your good theses you should not use indefinite language and generalizations, for example: maybe, perhaps, it seems, all, every and so on. Remember that a good thesis should be precise.
 
Usually, a good thesis is placed at the end of the first chapter, in which you introduce your work and say what it is going to be about.