Qualitative solutions for solving current issues related to all dimensions of sustainable development – environment, society and economy – are based on science and research. Therefore, it is crucial to ensure the sustainability of qualitative science and research in the long run. Students should be introduced to research and research methods from the very beginning of their study process. The aim of the research is to find out the optimal solutions for the order of the choice of research methods in the study process adapting to different perception and preparedness levels of students. Authors use the literature review to explore the most suitable research methods for different level – Bachelor`s, Master`s and Doctoral – students. Results show that the most appropriate research methods in the early phases of study process are analysis and synthesis, induction and deduction and monographic method. Student`s continuous improvement in research methodology can be achieved using such mathematical methods as grouping, correlation and indexation and such empirical research methods as observation, survey, interview and Delphi method. At the late stages of individual study process commonly used research methods include literature review, literature overview and qualitative content analysis and students have clear understanding where to find scientific articles and valid data for their research.