Specify variables of interest. Write down your independent and dependant variables? Depending on research question, you may not be able to write all of your independent variables yet (for example, if you are doing an exploratory study, it may be more difficult for you to have clear list). If that is case, explain what you believe will be your independent variables, based on what you have read/learned so far on topic. Include what your unit of analysis is.

How are you conceptualizing, operationalizing and measuring variables? Explain dimensions, indicators and validity. Write down the possible attributes of variables? What is the measurement level of variables? At last, what type of methods do you believe is the best for research question?