For psychology, make sure you learn all the content in detail and you can sort of predict the questions from the content so make essay plans with key names, make sure you learn the names and the exact study/finding which you can use. Learn some general evaluation points that you can use in every evaluation essay e.g any study can be argued as reductionist and learn the analysis to go with why reductionism is a weakness. Supporting evidence can always be used as a strength. For the content use
the textbook mainly and highlight the key points and narrow it down so you can learn it. Hope this helps