If time permits, you should have written a term paper in my class or at least attended a seminar before starting your thesis. This will give you an idea of what I consider important in an academic paper.
It is also advisable to attend my colloquium, provided that this is compatible with your thesis schedule. There you will get a feel for how final theses can be designed, what typical problems arise and how they can be solved.
I attach particular importance to a clear and workable research question and the resulting in-depth analysis and coherent argumentation. Remember to explicitly formulate an answer to your research question in the conclusions. This sounds very simple, but is sometimes difficult to implement. Be clear about what you want to investigate, why and how (see teaching guidelines).
Consider why I might be a suitable examiner for this. Of course, I only accept topics that fall within my area of expertise (international relations, international institutions, and peace and conflict studies, insofar as these relate to international relations).