Many doctoral students, particularly those opting for a qualitative methodological approach, use interviews in gathering their data. There is a variety of different ways to use interviewing in your research, and these are well reviewed in various methods texts. However there is often not a lot of guidance in these texts about some of the basic mechanics of being successful in your interviewing.
We just added a resource in the Guides, Tools, and Worksheets section of this website that provides some practical guidance on effective interviewing, based on our own research and our work with doctoral learners who use interviews. If you are planning on interviews as a part of your research, you might find this useful. Here is the link: