Italian: Don't do what I did all year; you'll just end up disappointed. I got basically A's to A+'s throughout the year, and in the exams, I crashed and burnt. Know all of your tenses 'perfectly'! It doesn't matter whether it is an 'are' 'ere' or 'ire' verb, you must know how to spell it as well as pronounce it. I also agree with Toothpick, don't leave the detailed study to the last minute. I was lost for words when she asked me for my 1 minute, and needed to ask 'puoi ripetere, non ho ben capito' about 3 or 4 times (many more throughout the whole thing...). So don't neglect it, and ultimately, make sure you get a teacher who knows what they're doing (mine didn't, and hence why I ended up with a 23 in Italian).
Psychology: My love-hate relationship with this subject continued throughout the duration of year 11. My strategy was to basically revise everything I knew, and consolidate it into long-term memory. Come time for the mid-year and end-of-year, I would recommend making little cards to memorise key facts and what not. Soon enough, those cards should just be used as cues, and you will know the knowledge back to front. And of course, it is best to understand rather than just memorise as you can apply your knowledge to different concepts better, and be able to tackle exam questions in more depth.
Good luck.
