It is useful to use the lecture slides/reading list a guide to focus you reading and learning for Geography at University.I would recommend starting with a topic you find particularly interesting then reading some of the work on this, creating summaries, e.g. scholar,year,key argument. From the areas you find interesting/read it is also a good idea to read any citations from these sources to see if any other perspectives/supporting points can be added into your summary. These are a great point of reference for essays/revision.