I have thought about research for years always this article has been helpful and useful in starting to plan the focus area of my research. I have especially gained a lot of comfort from these comments:
In order to decide the focus of your PhD, you need to be aware of critical decisions and understand the interdependency between them (e.g. imature topic > exploratory questions > qualitative method > small sample > analytical generalisation vs. mature topic > advanced questions > quantitative method > large sample > statistical generalisation);
Any suggestions in the area of social science and psychology are appreciated.