I'm also doing french a level right now and i got A* in the mock and basically what i do is
for paper 1 (reading/listening): bang out grammar and vocab, practice summaries and translation specifically and try to listen to french as often as you can and make sure it's a little bit faster and more complicated than is comfortable and treat it like a dictation - jot down what you think you hear then check with subtitles.
for speaking:
IRP - make up questions you think you might be asked and make fancy paragraphs to answer them and then just memorise them. Then practice dodging questions you don't know and somehow turning them into the answers you've prepared. However, leave some small things unprepared where you know the facts but you don't have the grammar ready so you have at least some spontaneous stuff because you don't want to sound like you're just verbal vomiting the entire time.
Speaking card: practise paraphrasing stuff for the first question and just gargle a bunch of facts and examples by using mindmaps/ flashcard/ blurting etc. Also try to use good opinion phrases and make sure to use some subjunctive and si stuff.
For writing: what books/films are you doing?