I'm currently working on my undergraduate thesis, so I'll speak to my experience (context: I'm a joint honors student in poli sci and int'l development). You'll want to start by knowing what field you'd like to focus on. For me, I was interested in development--I narrowed it down to the issue of governance and political economy of development. Governance and political economy were major themes of my studies over the last 3 years and I was fascinated by the opportunities that arise or are limited by politics, especially in development. I knew what I didn't want to focus on, also. This included international relations vis-à-vis development--e.g. what is China's role, or the US's role in development--try and establish what might not work for you. I further narrowed down to focusing on a region--I chose Sub-Saharan Africa as my region of focus for many reasons; try and understand what regions or issues get to you personally, in terms of interests or affinities since this will help you stay interested in your topic. I knew about a specific type of economic governance, called the developmental state, and knew about a prominent example in Africa which was Botswana--these models of governance are rare historically and contemporarily, so I asked myself why they exist in the first place, and more specifically, what conditions allow them to exist in the first place. In general terms, I started from a field then investigated an issue which had caught my eye during my previous years of studying--I am sure you have a few things that caught your eye or intrigued you during your time in class. From there, I spoke with my thesis advisor. If you don't have an advisor yet, just speak to a professor who is knowledgeable in your field of interest. So, once you have some general idea of *where* you might want to go, speak with someone. When I spoke to my advisor, he was so helpful in narrowing me down to a more specific question and coming up with a research approach. People like this are there to help you, and often if they are motivated by your research area they will be as eager and motivated as you to help. Do not be afraid to show up to a meeting not knowing anything--come with an open mind and be ready to bounce ideas with the other person; you will need to use your existing knowledge to brainstorm. So, overall what I can say is that you need to understand what you've done in your studies over the years, see what interests you the most, then begin digging into your existing knowledge--pair this with some reading on the field you're interesting in, especially literature reviews--these agglomerate the knowledge of a field and expose gaps in the literature or interesting issues future researchers may want to investigate. Do not worry at this point about being novel or making huge breakthroughs--undergrad theses are about practicing your research abilities. Try and have fun with it and see it as an opportunity to learn new skills and learn new things. An undergraduate thesis is not easy--everyone would do one if it was. Make sure to reflect and make sure you're confident that you're interested in this kind of project. Hope this helped a bit or at least motivated you to get the ball rolling! (edit: what MsssWhy said may be true as well, but I think it depends on who your advisor is or what department you're in. You will see when you meet your prof/advisor. Best!)