Great question! Getting stuck happens a lot in research because you are battling with the unknown! That is when you need to be either systematic or creative! There are certain things you learn over time that you can always try and when you get stuck you need to take a step back and try to look at the problem in a new way. Trying to pull out information usually helps, remind yourself what you are trying to do and why. What do you know already. What have you tried already. What haven’t you tried already. Testing things you think you know. Asking other people for advice. Sometimes just sleeping and coming back to it the next day help. Not every problem has a solution but you will be surprised how many do!