In some research groups, it is normal for PhD students to mentor undergraduate students or take a semester to work in industry to get more diverse experiences. Additionally, many prospective PhD students do not have access to resources and proper guidance to rely on when making important academic decisions such as those involved in choosing a PhD supervisor. In this short guide, we - a group of PhD students with varied backgrounds, research disciplines, and academic journeys - share our collective experiences with choosing our own PhD supervisors. [Extracted from the article]