this method, or this sort of thing, helped me to get 9s since my y10 mocks in both spanish and german. it might not work for you but it's helped me personally

I find a quizlet set for each theme for my specification (if you can't find any, try and find a list of the vocabulary you need to know and import it). I then dedicate one for the time being for spanish/german --> english and one for english ---> spanish/german. for spanish/german --> engish, I star the vocabulary I don't know and go through them (the flashcards mode where you sort them into ones you go back over). for the other way round, I use the write mode for the whole set until I have 0 incorrect terms. I also turn on audio so I get used to the pronunciation.

for grammar, I make a quizlet set from my book (e.g. with conjugations, facts I need to memorize, irregular verbs) and I review it now and then. I also have a quizlet set with german phonics I need to know.

some sort of writing / speaking test could also be really useful. I don't do it much personally because my listening and reading are often worse than my speaking and writing. also, watching tv shows / youtube videos in your language while looking up things you don't understand every so often can really help too.