hmmm... for most of your subjects I would suggest looking at past papers, but I'll break it up into individual topics to, just to be helpful
English Lit/Lang - I did English lit within 1 year (and got an A*) and didn't get the option to do English lang as we did AS English instead. However, I would suggest if you are writing about poems to know your notes and with books to know the key events. For descriptive writing, just swallow a thesauras and try to think outside of the box.
Maths: I also did this within in a year and got an A, mainly because I hate 3D trig
However, just do a ton of practice papers and exercises on any aspects of the course you are not sure of.
Biology/Chemistry/Physics: I did all these together (science and then additional), and I would suggest you do past papers as well as buy the revision guides. The ones by CPG are really good if you can find the one for your course...
French/German: For orals, I just type them out on the computer over and over again and then get my sister or someone to help me - also works with the writing side. For reading, you can try reading some foreign texts or the French/German side of everyday products like shampoo or toothpaste (I always do this). For listening, you can access some French/German videos on youtube or the BBC have some quite good resources. As a general note, label objects in your house in French/German using sticky notes.
Geography: I love geography, my favourite subject by far. My best advice is practice papers (again), but also to do posters on case studies and put them around your room. It can also be helpful to watch for interesting things on the news and incorporate that into the exam, but it is really necessary. Also, look at different textbooks for the course - we use the Edexcel old textbooks, but there is some extra, useful information in the new textbooks.
Drama: I think you're doing a different exam board to me as I'm doing AQA, which is pretty easy - you get to take notes in with you! But if you have a set text, just know the main events and the characters really well.
Hope that helps and good luck with your exams and your sixth-form offer