Tough question... Trying my best to remember what I did 2 years ago

I think before anything, read over the 1/2 notes/exams/outcomes and consolidate everything. 3/4 is very strongly based on these roots so its crucial you have no qualms with the work.
From there, I think it would be a good idea to have a skim over the textbook, especially the explanations and worked questions. You don't have to master all the concepts or be able to answer questions proficiently, but since methods has quite a long course, and its a good idea to expose yourself to whats coming. This should help once you learn the topics in class to ensure that you can grasp them quickly and get straight into it. Because you've seen the topics already, it wont take as long to understand, and you will build good connections in your head on the second listening.
If you have some more motivation, it may not hurt to get your feet wet and start doing questions. As I said, its a long course, and spreading work out may be a good idea. However, make sure of two things:
- If there are questions you can't do, make a note, and make sure to go over with your teacher later. Don't forget about these or neglect them. If these questions/concepts are used later on in a chapter, its best to stop doing questions of this chapter at this point.
- Don't get burnt out! There's a whole year ahead, so you also want to enjoy your holidays and relax before the work kicks in. Also, if you condense a lot of work before the year starts, you may have trouble remembering these skills later in the year. The key to methods is spreading the learning out.
Hope that helps. Feel free to ask me any Qs